Year % 1976 59.7361170550934 1977 62.1591612839371 1978 71.915952712081 1979 63.540296494378 1980 64.5660518845885 1981 58.5407485688638 1982 56.7396190254233 1983 90.7591599983889 1984 80.671219192303 1985 91.6718399912533 1986 91.817222644984 1987 92.8510548492906 1988 98.3917493192465 1989 123.65602381199 1990 169.080026288713 1991 148.177231407888 1992 114.14153680673 1993 94.3371886429813 1994 92.156448837022 1995 96.0494732313642 1996 88.6995724038716 1997 69.3475258295066 1998 56.1419347823085 1999 51.6371724883242 2000 47.5403296902657 2001 50.1184487497554 2002 118.379940833333 2003 58.9409958333333 2004 23.6791141666667 2005 13.6095233333333 2006 9.25001575 2007 8.93970391666667 2008 12.4476125 2009 15.284842385802 2010 10.3262221820083 2011 9.78182074182773 2012 11.1991921565682 2013 12.4340649587398 2014 15.5341402019916 2015 15.8410813948786 2016 16.1703130380291 2017 13.8334581432191 2018 12.201184744586 2019 11.5571850608681 2020 11.2312594501517 2021 7.45064820808614 2022 10.8653622268844 2023 11.8954328669923