1880   -0.4739
1881   -0.4409
1882   -0.4051
1883   -0.5915
1884   -0.6017
1885   -0.5170
1886   -0.4601
1887   -0.4255
1888   -0.4232
1889   -0.2431
1890   -0.4581
1891   -0.5060
1892   -0.4725
1893   -0.5259
1894   -0.3456
1895   -0.4008
1896   -0.2382
1897   -0.2839
1898   -0.3851
1899   -0.2082
1900   -0.1474
1901   -0.0725
1902   -0.3149
1903   -0.3819
1904   -0.4539
1905   -0.4145
1906   -0.1969
1907   -0.5925
1908   -0.4705
1909   -0.3833
1910   -0.3388
1911   -0.4479
1912   -0.5278
1913   -0.3358
1914   -0.0795
1915   -0.0633
1916   -0.3702
1917   -0.5322
1918   -0.3636
1919   -0.3173
1920   -0.2866
1921   -0.0569
1922   -0.2256
1923   -0.2041
1924   -0.2512
1925   -0.0978
1926    0.0041
1927   -0.1467
1928   -0.0907
1929   -0.4009
1930   -0.0666
1931   -0.0061
1932    0.0258
1933   -0.3210
1934   -0.0158
1935   -0.1146
1936   -0.1013
1937   -0.0029
1938    0.2137
1939    0.1331
1940    0.0796
1941    0.1031
1942    0.0688
1943    0.0933
1944    0.2044
1945   -0.0939
1946   -0.0218
1947    0.0554
1948    0.0418
1949   -0.0627
1950   -0.3384
1951   -0.0757
1952   -0.0845
1953    0.1664
1954   -0.1680
1955   -0.1395
1956   -0.4343
1957   -0.0673
1958    0.1140
1959    0.0440
1960   -0.0584
1961    0.0878
1962    0.1561
1963    0.2030
1964   -0.2439
1965   -0.1288
1966   -0.0716
1967   -0.0008
1968   -0.1126
1969   -0.0963
1970    0.0183
1971   -0.0397
1972   -0.1760
1973    0.2984
1974   -0.2157
1975    0.1171
1976   -0.2573
1977    0.1983
1978    0.0772
1979    0.1392
1980    0.2652
1981    0.4835
1982    0.0884
1983    0.4767
1984    0.0457
1985    0.0650
1986    0.2685
1987    0.4040
1988    0.5404
1989    0.3752
1990    0.5697
1991    0.5267
1992    0.2551
1993    0.3365
1994    0.4577
1995    0.7690
1996    0.3438
1997    0.6657
1998    0.9387
1999    0.7820
2000    0.6327
2001    0.8203
2002    0.9439
2003    0.8934
2004    0.8250
2005    1.0584
2006    0.9230
2007    1.0989
2008    0.8637
2009    0.8726
2010    1.0877
2011    0.9006
2012    0.9194
2013 -999.0000