1975 60.34 1975 61.80 1975 61.54 1975 62.52 1976 63.44 1976 65.68 1976 66.34 1976 67.32 1977 69.49 1977 72.68 1977 74.33 1977 76.88 1978 79.32 1978 82.57 1978 84.92 1978 87.47 1979 91.57 1979 94.36 1979 96.41 1979 98.36 1980 100.00 1980 101.51 1980 104.66 1980 104.91 1981 105.58 1981 108.09 1981 109.55 1981 109.85 1982 111.06 1982 111.57 1982 110.88 1982 111.68 1983 113.74 1983 115.10 1983 115.83 1983 116.27 1984 117.98 1984 119.91 1984 121.08 1984 122.22 1985 123.93 1985 125.89 1985 128.04 1985 129.57 1986 132.10 1986 134.83 1986 137.06 1986 139.21 1987 142.13 1987 144.49 1987 146.33 1987 147.36 1988 149.88 1988 152.98 1988 154.49 1988 156.02 1989 158.02 1989 160.22 1989 163.84 1989 165.24 1990 165.91 1990 166.15 1990 166.85 1990 166.19 1991 167.61 1991 168.59 1991 168.71 1991 171.06 1992 172.31 1992 172.15 1992 174.03 1992 174.85 1993 174.79 1993 176.35 1993 177.61 1993 179.09 1994 180.09 1994 181.03 1994 181.72 1994 181.45 1995 182.20 1995 185.41 1995 188.28 1995 189.82 1996 192.14 1996 192.46 1996 193.31 1996 194.99 1997 196.81 1997 198.42 1997 201.32 1997 203.97 1998 207.08 1998 208.65 1998 211.56 1998 214.09 1999 216.20 1999 219.04 1999 222.21 1999 224.58 2000 229.01 2000 232.72 2000 237.05 2000 240.83 2001 247.03 2001 251.16 2001 255.09 2001 258.38 2002 262.14 2002 266.58 2002 272.14 2002 276.13 2003 279.52 2003 282.83 2003 287.25 2003 295.40 2004 300.33 2004 307.63 2004 319.03 2004 326.35 2005 334.05 2005 344.32 2005 354.75 2005 362.86 2006 369.04 2006 372.27 2006 375.47 2006 380.49 2007 382.69 2007 382.59 2007 379.56 2007 380.35 2008 380.12 2008 373.00 2008 364.19 2008 364.13 2009 367.02 2009 358.18 2009 349.72 2009 347.17