technology = { id = 0   average_year = 1300       trade_efficiency = 0.10               }
technology = { id = 1   average_year = 1360       trade_efficiency = 0.20               }
technology = { id = 2   average_year = 1380       trade_efficiency = 0.25  merchants = yes             }
technology = { id = 3   average_year = 1400       trade_efficiency = 0.26               }
technology = { id = 4   average_year = 1410       trade_efficiency = 0.27               }
technology = { id = 5   average_year = 1420       trade_efficiency = 0.28               }
technology = { id = 6   average_year = 1430       trade_efficiency = 0.29               }
technology = { id = 7   average_year = 1440       trade_efficiency = 0.30               }
technology = { id = 8   average_year = 1450       trade_efficiency = 0.31               }
technology = { id = 9   average_year = 1455       trade_efficiency = 0.32               }
technology = { id = 10  average_year = 1460       trade_efficiency = 0.34               }
technology = { id = 11  average_year = 1470       trade_efficiency = 0.36               }
technology = { id = 12  average_year = 1480       trade_efficiency = 0.38               }
technology = { id = 13  average_year = 1490       trade_efficiency = 0.40               }
technology = { id = 14  average_year = 1495       trade_efficiency = 0.42   refinery = yes            }
technology = { id = 15  average_year = 1500       trade_efficiency = 0.44   monopoly = yes            }
technology = { id = 16  average_year = 1510       trade_efficiency = 0.46               }
technology = { id = 17  average_year = 1520       trade_efficiency = 0.48               }
technology = { id = 18  average_year = 1530       trade_efficiency = 0.50               }
technology = { id = 19  average_year = 1540       trade_efficiency = 0.51               }
technology = { id = 20  average_year = 1545       trade_efficiency = 0.52               }
technology = { id = 21  average_year = 1550       trade_efficiency = 0.53   marketplace = yes            }
technology = { id = 22  average_year = 1565       trade_efficiency = 0.54               }
technology = { id = 23  average_year = 1585       trade_efficiency = 0.55               }
technology = { id = 24  average_year = 1600       trade_efficiency = 0.56               }
technology = { id = 25  average_year = 1610       trade_efficiency = 0.57               }
technology = { id = 26  average_year = 1620       trade_efficiency = 0.58               }
technology = { id = 27  average_year = 1625       trade_efficiency = 0.59               }
technology = { id = 28  average_year = 1636       trade_efficiency = 0.60               }
technology = { id = 29  average_year = 1644       trade_efficiency = 0.61               }
technology = { id = 30  average_year = 1655       trade_efficiency = 0.62               }
technology = { id = 31  average_year = 1660       trade_efficiency = 0.63               }
technology = { id = 32  average_year = 1675       trade_efficiency = 0.64               }
technology = { id = 33  average_year = 1690       trade_efficiency = 0.65               }
technology = { id = 34  average_year = 1700       trade_efficiency = 0.66               }
technology = { id = 35  average_year = 1709       trade_efficiency = 0.67               }
technology = { id = 36  average_year = 1714       trade_efficiency = 0.68               }
technology = { id = 37  average_year = 1719       trade_efficiency = 0.69               }
technology = { id = 38  average_year = 1723       trade_efficiency = 0.70               }
technology = { id = 39  average_year = 1725       trade_efficiency = 0.71               }
technology = { id = 40  average_year = 1727       trade_efficiency = 0.72               }
technology = { id = 41  average_year = 1730       trade_efficiency = 0.73               }
technology = { id = 42  average_year = 1732       trade_efficiency = 0.74               }
technology = { id = 43  average_year = 1735       trade_efficiency = 0.75               }
technology = { id = 44  average_year = 1737       trade_efficiency = 0.76               }
technology = { id = 45  average_year = 1743       trade_efficiency = 0.77               }
technology = { id = 46  average_year = 1747       trade_efficiency = 0.78               }
technology = { id = 47  average_year = 1750       trade_efficiency = 0.79               }
technology = { id = 48  average_year = 1755       trade_efficiency = 0.80               }
technology = { id = 49  average_year = 1760       trade_efficiency = 0.81               }
technology = { id = 50  average_year = 1765       trade_efficiency = 0.82               }
technology = { id = 51  average_year = 1770       trade_efficiency = 0.83               }
technology = { id = 52  average_year = 1775       trade_efficiency = 0.84               }
technology = { id = 53  average_year = 1780       trade_efficiency = 0.85               }
technology = { id = 54  average_year = 1785       trade_efficiency = 0.86               }
technology = { id = 55  average_year = 1790       trade_efficiency = 0.87               }
technology = { id = 56  average_year = 1791       trade_efficiency = 0.88               }
technology = { id = 57  average_year = 1792       trade_efficiency = 0.89               }
technology = { id = 58  average_year = 1795       trade_efficiency = 0.90               }
technology = { id = 59  average_year = 1798       trade_efficiency = 0.91               }
technology = { id = 60  average_year = 1801       trade_efficiency = 0.92            }
technology = { id = 61  average_year = 1803       trade_efficiency = 0.93            }
technology = { id = 62  average_year = 1805       trade_efficiency = 0.94            }
technology = { id = 63  average_year = 1807       trade_efficiency = 0.95            }
technology = { id = 64  average_year = 1809       trade_efficiency = 0.96            }
technology = { id = 65  average_year = 1811       trade_efficiency = 0.97            }
technology = { id = 66  average_year = 1813       trade_efficiency = 0.98            }
technology = { id = 67  average_year = 1815       trade_efficiency = 0.99            }
technology = { id = 68  average_year = 1820       trade_efficiency = 1.00            }
technology = { id = 69  average_year = 1830       trade_efficiency = 1.01            }
technology = { id = 70  average_year = 1840       trade_efficiency = 1.02            }
technology = { id = 71  average_year = 1850       trade_efficiency = 1.03            }
technology = { id = 72  average_year = 1880       trade_efficiency = 1.04            }
