year,IPC1,IPC2,IPC4
1850,0.0,0.0,0.0
1851,0.0,0.0,0.0
1852,0.0,0.0,0.0
1853,0.0,0.0,0.0
1854,0.0,0.0,0.0
1855,0.0,0.0,0.0
1856,0.0,0.0,0.0
1857,0.0,0.0,0.0
1858,0.0,0.0,0.0
1859,0.0,0.0,0.0
1860,0.0,0.0,0.0
1861,0.0,0.0,0.0
1862,0.0,0.0,0.0
1863,0.0,0.0,0.0
1864,0.0,0.0,0.0
1865,0.0,0.0,0.0
1866,0.0,0.0,0.0
1867,0.0,0.0,0.0
1868,0.0,0.0,0.0
1869,0.0,0.0,0.0
1870,0.0,0.0,0.0
1871,0.0,0.0,0.0
1872,0.0,0.0,0.0
1873,0.0,0.0,0.0
1874,0.0,0.0,0.0
1875,0.0,0.0,0.0
1876,0.0,0.0,0.0
1877,0.0,0.0,0.0
1878,0.0,0.0,0.0
1879,0.0,0.0,0.0
1880,0.0,0.0,0.0
1881,0.0,0.0,0.0
1882,0.0,0.0,0.0
1883,0.0,0.0,0.0
1884,0.0,0.0,0.0
1885,0.0,0.0,0.0
1886,0.0,0.0,0.0
1887,0.0,0.0,0.0
1888,0.0,0.0,0.0
1889,0.0,0.0,0.0
1890,0.0,5.05e-05,0.0
1891,0.0,5.05e-05,0.0
1892,0.0,5.05e-05,0.0
1893,0.0,5.05e-05,0.0
1894,0.0,5.05e-05,0.0
1895,0.0,5.05e-05,0.0
1896,0.0,5.05e-05,0.0
1897,0.0,5.05e-05,0.0
1898,0.0,5.05e-05,0.0
1899,0.0,5.05e-05,0.0
1900,0.0,5.05e-05,0.0
1901,0.0,5.05e-05,0.0
1902,0.0,5.06e-05,0.0
1903,0.0,5.06e-05,0.0
1904,0.0,5.06e-05,0.0
1905,0.0,5.07e-05,0.0
1906,0.0,5.07e-05,0.0
1907,0.0,5.0799999999999995e-05,0.0
1908,0.0,5.0900000000000004e-05,0.0
1909,0.0,5.0900000000000004e-05,0.0
1910,0.0,5.1e-05,0.0
1911,0.0,5.1200000000000004e-05,0.0
1912,0.0,5.14e-05,0.0
1913,0.0,5.17e-05,0.0
1914,0.0,5.2e-05,0.0
1915,0.0,5.24e-05,0.0
1916,0.0,5.2900000000000005e-05,0.0
1917,0.0,5.33e-05,0.0
1918,0.0,5.37e-05,0.0
1919,0.0,5.41e-05,0.0
1920,0.0,5.4499999999999997e-05,0.0
1921,0.0,5.4800000000000004e-05,0.0
1922,0.0,5.5100000000000004e-05,0.0
1923,0.0,5.54e-05,0.0
1924,0.0,5.57e-05,0.0
1925,0.0,5.6e-05,0.0
1926,0.0,5.64e-05,0.0
1927,0.0,5.67e-05,0.0
1928,0.0,5.71e-05,0.0
1929,0.0,5.75e-05,0.0
1930,0.0,5.8e-05,0.0
1931,0.0,5.8500000000000006e-05,0.0
1932,0.0,5.9e-05,0.0
1933,0.00367,5.9499999999999996e-05,3.31e-06
1934,0.044,6.02e-05,3.9699999999999996e-05
1935,0.0257,6.09e-05,2.3199999999999998e-05
1936,0.077,6.17e-05,6.950000000000001e-05
1937,0.205,6.27e-05,0.000185
1938,0.216,6.39e-05,0.000195
1939,2.63,6.53e-05,0.00237
1940,2.97,6.69e-05,0.00268
1941,1.97,7.09e-05,0.0017800000000000001
1942,1.25,7.950000000000001e-05,0.00113
1943,1.87,9.25e-05,0.0016899999999999999
1944,2.5,0.00011,0.00225
1945,0.92,0.000131,0.0008309999999999999
1946,0.946,0.000155,0.0008539999999999999
1947,5.36,0.000184,0.00484
1948,0.0843,0.000216,7.61e-05
1949,11.5,0.00025,0.0104
1950,0.414,0.00028799999999999995,0.000374
1951,0.301,0.00034399999999999996,0.00027100000000000003
1952,0.323,0.000431,0.00029099999999999997
1953,0.345,0.0005480000000000001,0.000311
1954,0.356,0.0006919999999999999,0.000321
1955,0.301,0.000862,0.00027100000000000003
1956,0.301,0.0010500000000000002,0.00027100000000000003
1957,0.293,0.00127,0.000265
1958,0.323,0.0015,0.00029099999999999997
1959,0.33,0.00175,0.000298
1960,0.334,0.00202,0.000301
1961,0.304,0.00232,0.000275
1962,0.367,0.0027,0.000331
1963,0.356,0.00316,0.000321
1964,0.341,0.00368,0.000308
1965,0.337,0.00428,0.000305
1966,0.491,0.00495,0.000444
1967,0.436,0.005690000000000001,0.00039400000000000004
1968,0.429,0.00651,0.00038700000000000003
1969,0.488,0.0074,0.00044
1970,8.21,0.0061200000000000004,0.00041299999999999996
1971,7.52,0.00635,0.000435
1972,9.46,0.0072,0.00046300000000000003
1973,9.98,0.00743,0.000489
1974,8.19,0.00767,0.000508
1975,7.08,0.00791,0.000519
1976,6.02,0.008150000000000001,0.000565
1977,6.39,0.008400000000000001,0.000596
1978,9.54,0.00865,0.000619
1979,7.44,0.00889,0.000678
1980,6.88,0.00789,0.0006720000000000001
1981,2.06,0.00874,0.000633
1982,2.66,0.008960000000000001,0.0006580000000000001
1983,2.74,0.009179999999999999,0.000679
1984,1.91,0.0094,0.0006979999999999999
1985,2.6,0.009640000000000001,0.0007149999999999999
1986,2.3,0.0105,0.000728
1987,3.32,0.0101,0.000755
1988,5.72,0.0104,0.00078
1989,6.35,0.011300000000000001,0.0008
1990,6.19,0.0115,0.000832
1991,5.31,0.00996,0.00087
1992,5.21,0.0121,0.000896
1993,4.97,0.011800000000000001,0.000925
1994,4.69,0.0121,0.000958
1995,4.79,0.0123,0.000994
1996,4.75,0.137,0.00103
1997,4.94,0.138,0.00107
1998,5.16,0.12,0.00108
1999,3.81,0.116,0.0011200000000000001
2000,4.59,0.131,0.00116
2001,4.39,0.127,0.0012
2002,4.26,0.135,0.00125
2003,4.48,0.132,0.0012900000000000001
2004,4.88,0.136,0.00133
2005,4.87,0.147,0.00136
2006,4.74,0.137,0.00141
2007,8.32,0.115,0.00145
2008,9.0,0.138,0.00149
2009,7.76,0.126,0.0015300000000000001
2010,8.07,0.153,0.00157
2011,9.55,0.16,0.00161
2012,9.5,0.182,0.00165
2013,7.63,0.186,0.00165
2014,8.93,0.193,0.00165
2015,9.52,0.187,0.00165
2016,10.5,0.213,0.0016699999999999998
2017,10.8,0.233,0.0016799999999999999
2018,14.9,0.233,0.0017