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