DJF MAM JJA SON 1905 984.871 986.269 986.357 979.479 1906 983.844 984.165 991.398 982.672 1907 987.478 981.566 994.232 985.924 1908 988.298 985.191 985.992 982.735 1909 989.346 982.719 985.721 986.828 1910 985.333 986.464 987.561 983.313 1911 993.265 991.231 987.921 986.008 1912 987.673 980.693 990.073 982.993 1913 988.696 986.141 992.405 982.063 1914 987.536 984.176 993.319 981.591 1915 987.135 988.264 988.191 987.094 1916 986.387 988.568 992.923 983.601 1917 984.476 985.135 987.052 985.859 1918 988.29 988.687 993.492 987.027 1919 987.183 991.386 985.839 982.267 1920 987.195 989.003 987.652 983.707 1921 989.697 989.443 986.014 987.092 1922 987.639 981.183 986.293 985.146 1923 985.343 985.253 993.842 987.299 1924 986.265 986.694 986.647 986.109 1925 996.038 984.183 988.613 984.606 1926 987.74 987.802 995.1 985.51 1927 981.393 981.811 988.47 985.743 1928 990.459 987.269 990.919 986.623 1929 985.956 986.594 986.007 981.667 1930 987.913 981.215 989.946 987.564 1931 984.541 987.75 986.642 985.455 1932 988.529 986.294 993.063 979.196 1933 985.376 985.416 988.786 981.904 1934 984.636 986.052 986.533 984.406 1935 989.388 983.067 992.456 985.325 1936 986.014 986.335 990.287 984.661 1937 987.27 987.294 990.252 982.936 1938 990.349 990.628 985.547 981.871 1939 989.09 987.691 991.986 981.986 1940 987.501 984.206 989.787 986.505 1941 990.455 988.253 990.322 984.381 1942 988.021 986.494 989.932 989.872 1943 984.025 984.824 989.334 982.863 1944 992.024 986.126 989.518 987.959 1945 991.13 990.787 991.946 984.613 1946 991.032 991.498 994.314 984.33 1947 987.822 986.081 990.512 980.998 1948 989.476 986.851 989.948 986.386 1949 992.946 990.363 986.418 981.982 1950 986.972 992.484 988.433 985.152 1951 989.614 989.901 988.385 987.544 1952 982.67 986.097 994.571 983.652 1953 988.656 988.093 987.246 984.478 1954 991.65 987.501 989.982 983.298 1955 991.585 987.582 991.079 985.447 1956 988.36 994.909 992.236 983.852 1957 992.41 986.344 990.717 985.9 1958 984.122 988.672 989.957 981.688 1959 989.624 986.196 992.048 981.274 1960 990.536 983.808 987.24 981.674 1961 986.585 985.966 991.804 979.504 1962 983.315 989.886 988.482 986.952 1963 989.979 985.534 994.076 986.676 1964 996.341 986.183 990.57 986.619 1965 992.368 988.469 990.105 979.077 1966 990.778 986.656 990.082 983.607 1967 989.328 988.162 991.86 983.34 1968 990.542 984.937 983.619 985.527 1969 986.901 986.61 990.969 979.568 1970 989.321 986.653 990.174 985.937 1971 991.673 987.88 989.639 984.843 1972 987.826 990.061 992.48 987.008 1973 985.368 982.164 990.644 985.385 1974 988.07 986.47 991.262 983.198 1975 988.659 988.226 990.66 983.075 1976 991.816 984.317 984.206 987.974 1977 986.256 983.856 994.344 982.715 1978 986.059 991.95 987.885 982.898 1979 992.867 986.256 987.118 984.223 1980 987.332 991.275 989.669 984.873 1981 987.395 992.011 989.305 983.136 1982 991.109 984.766 993.693 983.133 1983 987.533 991.869 987.648 982.37 1984 989.847 988.356 996.795 985.347 1985 984.558 990.379 990.166 984.147 1986 988.298 991.983 981.406 983.751 1987 986.55 986.469 994.501 984.782 1988 987.011 988.296 989.932 985.802 1989 989.365 987.114 988.636 983.892 1990 987.624 990.133 983.209 980.093 1991 991.099 988.874 989.064 988.097 1992 991.437 993.312 994.862 985.28 1993 985.766 987.724 991.013 983.933 1994 986.449 988.859 993.771 984.797 1995 986.359 988.357 987.904 984.168 1996 987.276 984.824 987.912 984.503 1997 991.942 988.088 992.079 986.776 1998 982.55 989.142 982.978 982.904 1999 982.914 987.595 989.68 984.103 2000 989.356 991.408 996.709 988.999 2001 983.223 989.246 988.124 984.26 2002 986.595 989.798 993.48 988.406 2003 988.213 988.218 987.505 984.084 2004 986.074 986.483 988.759 984.195 2005 991.026 986.939 991.904 987.656 2006 986.027 987.124 994.318 983.753 2007 983.135 986.907 988.193 985.5 2008 980.622 987.246 992.45 985.727 2009 989.876 988.26 990.532 981.869 2010 986.196 982.724 988.046 985.658 2011 983.847 984.132 994.563 986.385 2012 988.7 988.668 985.659 984.157 2013 985.92 989.047 984.989 984.878