1981 338.453 363.404 <> <> 1982 341.583 366.138 <> <> 1983 343.898 368.444 <> <> 1984 345.732 370.417 <> <> 1985 347.643 372.112 <> <> 1986 349.613 374.119 <> <> 1987 352.554 376.289 <> <> 1988 353.762 377.721 <> <> 1989 353.471 377.947 <> <> 1990 355.323 378.915 <> <> 1991 339.128 359.013 <> <> 1992 338.049 358.686 <> <> 1993 336.904 357.845 <> <> 1994 335.445 357.942 <> <> 1995 333.311 355.990 <> <> 1996 332.621 355.234 <> <> 1997 332.912 355.457 <> <> 1998 331.809 354.742 <> <> 1999 330.134 353.660 <> <> 2000 327.564 351.726 <> <> 2001 328.131 357.914 <> <> 2002 326.170 356.731 <> <> 2003 324.754 354.976 <> <> 2004 322.197 353.080 <> <> 2005 319.681 351.139 <> <> 2006 317.240 349.312 <> <> 2007 314.928 348.245 <> <> 2008 312.639 346.794 <> <> 2009 311.030 345.051 <> <> 2010 311.121 344.754 <> <> 2011 313.015 344.151 <> <>