Year % 1978 19.6056589060933 1979 108.47288158751626 1980 79.09675739735793 1981 133.9889469325135 1982 35.94431757502899 1983 24.84467038448327 1984 42.2603048091074 1985 61.59569812142181 1986 56.60973895658189 1987 97.16646547501959 1988 66.92447912481182 1989 45.52083727467534 1990 43.066824399765444 1991 29.941413919331026 1992 38.86766431115171 1993 43.907210910068265 1994 94.69269726670498 1995 49.04755831943084 1996 47.6881275759465 1997 40.85343241677236 1998 36.68718154891844 1999 21.636029087980823 2000 30.49202712732748 2001 34.506146891003446 2002 25.45593361772342 2003 23.656762421710095 2004 28.97284276520662 2005 29.370669207279573 2006 31.640359288238667 2007 38.99346079708036 2008 72.71337370610946 2009 40.44795710591379 2010 44.85383085716339 2011 49.27073919526914 2012 47.302005873075025 2013 49.92052554080593 2014 49.83158236273315 2015 51.982811531656985 2016 47.291095375193585 2017 44.51858395910039 2018 55.49074655728346 2019 59.154784735296765 2020 91.72088321363262 2021 106.6885186473696 2022 96.87787054313809