Year Measure 1960 92.31106 1961 96.92011 1962 112.05986 1963 120.58375 1964 132.05824 1965 143.83512 1966 156.63289 1967 170.26931 1968 184.59587 1969 205.54767 1970 222.38619 1971 246.30067 1972 276.40795 1973 297.33965 1974 312.45569 1975 358.57943 1976 420.58238 1977 461.6835 1978 479.52025 1979 488.53339 1980 495.54391 1981 519.20101 1982 543.35266 1983 555.40895 1984 613.6662 1985 659.74839 1986 698.70448 1987 771.16092 1988 809.18353 1989 874.7476 1990 929.69993 1991 965.30794 1992 1044.36188 1993 1115.19579 1994 1145.50498 1995 1227.32846 1996 1328.35306 1997 1439.97683 1998 1520.09821 1999 1556.33587 2000 1652.74826 2001 1613.01795 2002 1667.42259 2003 1771.92369 2004 1891.92745 2005 2013.89014 2006 2178.86243 2007 2347.11755 2008 2421.97505 2009 2314.11391 2010 2491.63126 2011 2696.3148 2012 2772.05805 2013 2760.64603 2014 2854.56585