1958.0 317.45 1958.5 312.60 1959.0 317.72 1959.5 313.26 1960.0 319.02 1960.5 313.83 1961.0 319.48 1961.5 315.38 1962.0 320.63 1962.5 315.42 1963.0 321.39 1963.5 315.99 1964.0 321.80 1964.5 316.79 1965.0 322.13 1965.5 317.30 1966.0 323.87 1966.5 318.10 1967.0 324.42 1967.5 319.31 1968.0 325.02 1968.5 320.25 1969.0 326.66 1969.5 321.78 1970.0 328.14 1970.5 323.16 1971.0 327.78 1971.5 323.56 1972.0 329.72 1972.5 325.06 1973.0 331.50 1973.5 327.18 1974.0 332.65 1974.5 327.21 1975.0 333.29 1975.5 328.35 1976.0 334.78 1976.5 328.77 1977.0 336.03 1977.5 331.21 1978.0 337.77 1978.5 332.40 1979.0 338.96 1979.5 334.12 1980.0 340.86 1980.5 336.05 1981.0 342.56 1981.5 337.13 1982.0 343.83 1982.5 338.09 1983.0 345.08 1983.5 340.12 1984.0 346.59 1984.5 341.54 1985.0 348.02 1985.5 342.92 1986.0 349.57 1986.5 344.34 1987.0 351.12 1987.5 346.48 1988.0 353.53 1988.5 348.94 1989.0 355.43 1989.5 350.10 1990.0 356.10 1990.5 351.36 1991.0 358.40 1991.5 352.22 1992.0 358.91 1992.5 353.21 1993.0 359.17 1993.5 354.03 1994.0 361.13 1994.5 355.89 1995.0 363.05 1995.5 357.80 1996.0 364.28 1996.5 359.34 1997.0 366.02 1997.5 360.49 1998.0 368.42 1998.5 364.18 1999.0 370.77 1999.5 365.17 2000.0 371.63 2000.5 366.94 2001.0 373.32 2001.5 368.38 2002.0 374.93 2002.5 370.50 2003.0 377.75 2003.5 373.10 2004.0 380.42 2004.5 374.47 2005.0 382.20 2005.5 376.98 2006.0 384.65 2006.5 379.06 2007.0 386.36 2007.5 381.09 2008.0 387.18 2008.5 382.98 2009.0 389.46 2009.5 384.38 2010.0 392.46 2010.5 387.18