year,IPC1,IPC2,IPC4
1850,0.0247,0.0,8.59e-06
1851,0.026,0.0,9.04e-06
1852,0.027399999999999997,0.0,9.53e-06
1853,0.0289,0.0,1e-05
1854,0.0304,0.0,1.06e-05
1855,0.032100000000000004,0.0,1.12e-05
1856,0.0339,0.0,1.18e-05
1857,0.0357,0.0,1.24e-05
1858,0.0376,0.0,1.31e-05
1859,0.0395,0.0,1.38e-05
1860,0.0415,0.0,1.45e-05
1861,0.0436,0.0,1.52e-05
1862,0.0458,0.0,1.6e-05
1863,0.048100000000000004,0.0,1.68e-05
1864,0.0505,0.0,1.76e-05
1865,0.053,0.0,1.85e-05
1866,0.055600000000000004,0.0,1.94e-05
1867,0.0584,0.0,2.03e-05
1868,0.061200000000000004,0.0,2.13e-05
1869,0.06420000000000001,0.0,2.23e-05
1870,0.0673,0.0,2.34e-05
1871,0.0705,0.0,2.46e-05
1872,0.074,0.0,2.58e-05
1873,0.0777,0.0,2.7099999999999998e-05
1874,0.08159999999999999,0.0,2.8400000000000003e-05
1875,0.0856,0.0,2.98e-05
1876,0.08979999999999999,0.0,3.13e-05
1877,0.09409999999999999,0.0,3.2800000000000004e-05
1878,0.0986,0.0,3.43e-05
1879,0.103,0.0,3.59e-05
1880,0.108,0.0,3.75e-05
1881,0.112,0.0,3.92e-05
1882,0.117,0.0,4.09e-05
1883,0.122,0.0,4.26e-05
1884,0.127,0.0,4.44e-05
1885,0.133,0.0,4.62e-05
1886,0.138,0.0,4.82e-05
1887,0.144,0.0,5.02e-05
1888,0.15,0.0,5.22e-05
1889,0.156,0.0,5.4399999999999994e-05
1890,0.171,0.0,5.9499999999999996e-05
1891,0.177,0.0,6.17e-05
1892,0.184,0.0,6.419999999999999e-05
1893,0.192,0.0,6.68e-05
1894,0.2,0.0,6.950000000000001e-05
1895,0.208,0.0,7.240000000000001e-05
1896,0.217,0.0,7.549999999999999e-05
1897,0.226,0.0,7.87e-05
1898,0.235,0.0,8.2e-05
1899,0.245,0.0,8.54e-05
1900,0.255,0.0,8.89e-05
1901,0.267,1.11e-05,9.279999999999999e-05
1902,0.279,4.38e-05,9.73e-05
1903,0.293,9.71e-05,0.000102
1904,0.308,0.00017,0.000107
1905,0.323,0.000261,0.000112
1906,0.337,0.00037,0.000118
1907,0.352,0.000496,0.000122
1908,0.365,0.000637,0.000127
1909,0.376,0.0007930000000000001,0.000131
1910,0.385,0.000962,0.000134
1911,0.394,0.00127,0.00013700000000000002
1912,0.402,0.00181,0.00014000000000000001
1913,0.409,0.0025499999999999997,0.00014299999999999998
1914,0.416,0.00348,0.000145
1915,0.423,0.00455,0.000147
1916,0.429,0.00574,0.00015
1917,0.435,0.00701,0.00015099999999999998
1918,0.44,0.00835,0.000153
1919,0.444,0.009710000000000002,0.000155
1920,0.447,0.0111,0.000156
1921,0.449,0.0125,0.000156
1922,0.451,0.014,0.000157
1923,0.453,0.0157,0.000158
1924,0.454,0.0175,0.000158
1925,0.455,0.0195,0.000158
1926,0.456,0.0216,0.00015900000000000002
1927,0.458,0.0238,0.00015900000000000002
1928,0.459,0.026199999999999998,0.00016
1929,0.461,0.0286,0.000161
1930,0.464,0.0313,0.000162
1931,0.468,0.0346,0.000163
1932,0.476,0.0389,0.000166
1933,0.485,0.044,0.00016900000000000002
1934,0.497,0.0494,0.00017299999999999998
1935,0.51,0.0549,0.000178
1936,0.525,0.0601,0.000183
1937,0.54,0.06470000000000001,0.000188
1938,0.557,0.0589,0.000194
1939,0.574,0.059,0.0002
1940,0.592,0.0591,0.000206
1941,0.609,0.0591,0.000212
1942,0.626,0.056299999999999996,0.00021799999999999999
1943,0.644,0.0495,0.000224
1944,0.664,0.0407,0.000231
1945,0.687,0.0319,0.00023899999999999998
1946,0.712,0.025,0.000248
1947,0.743,0.0223,0.000259
1948,0.778,0.0295,0.00027100000000000003
1949,1.21,0.033,0.000421
1950,1.29,0.0367,0.000448
1951,1.52,0.0426,0.00053
1952,1.5,0.0453,0.000524
1953,1.69,0.054700000000000006,0.0005899999999999999
1954,1.75,0.0842,0.000609
1955,1.83,0.104,0.0006360000000000001
1956,2.06,0.116,0.000719
1957,2.32,0.12,0.0008070000000000001
1958,2.3,0.155,0.0008010000000000001
1959,2.64,0.154,0.0009180000000000001
1960,2.88,0.16,0.001
1961,3.28,0.178,0.00114
1962,3.58,0.192,0.00125
1963,4.14,0.195,0.0014399999999999999
1964,4.12,0.19,0.0014299999999999998
1965,4.68,0.203,0.00163
1966,5.04,0.206,0.00176
1967,5.95,0.186,0.00207
1968,6.02,0.266,0.0021000000000000003
1969,7.57,0.265,0.00264
1970,8.19,0.304,0.00259
1971,8.9,0.349,0.00266
1972,9.08,0.303,0.00282
1973,9.08,0.32,0.003
1974,10.4,0.396,0.0030800000000000003
1975,10.7,0.382,0.00315
1976,12.1,0.485,0.00342
1977,13.7,0.618,0.00364
1978,15.1,0.708,0.0038399999999999997
1979,15.2,0.731,0.00409
1980,15.9,0.819,0.00432
1981,17.9,0.823,0.00453
1982,19.0,0.783,0.00463
1983,20.2,0.909,0.00479
1984,21.4,0.958,0.005019999999999999
1985,22.1,0.941,0.0050999999999999995
1986,24.6,1.11,0.0054
1987,27.2,1.1,0.0057599999999999995
1988,28.4,1.06,0.00605
1989,29.3,1.05,0.00623
1990,26.4,0.907,0.00639
1991,27.8,0.835,0.00661
1992,32.3,0.826,0.00683
1993,34.1,0.868,0.0070599999999999994
1994,30.3,0.964,0.00729
1995,30.5,0.939,0.00747
1996,28.1,0.982,0.0076500000000000005
1997,29.7,0.939,0.00787
1998,38.3,0.787,0.00779
1999,42.0,0.824,0.00795
2000,39.8,0.8,0.00831
2001,37.3,0.709,0.008400000000000001
2002,39.0,0.7,0.00852
2003,42.8,0.677,0.00868
2004,41.2,0.64,0.00902
2005,43.4,0.6,0.00932
2006,41.6,0.565,0.00942
2007,43.2,0.562,0.00962
2008,43.3,0.719,0.00982
2009,41.6,0.621,0.01
2010,39.9,0.764,0.010199999999999999
2011,43.0,0.771,0.0104
2012,42.6,0.824,0.0106
2013,44.1,0.862,0.0106
2014,43.3,0.913,0.0106
2015,43.6,0.914,0.0106
2016,44.7,0.913,0.0107
2017,47.7,0.912,0.0108
2018,48.0,0.912,0.0109