Year % 1979 24.467615927419402 1980 34.4756374768375 1981 44.1327661528088 1982 30.1711843813099 1983 105.465990612687 1984 10.173836744764401 1985 9.422018348623851 1986 21.2043770512369 1987 39.8704840991238 1988 42.8454405573247 1989 45.4565892914216 1990 63.5407841255606 1991 58.6641483036027 1992 44.0964910213111 1993 56.6121716238817 1994 76.5417713537135 1995 24.0744129073821 1996 22.6444970517424 1997 29.9949339590732 1998 33.80370365569 1999 32.076489092195395 2000 43.0080523896767 2001 25.998708892787096 2002 26.9874276876644 2003 25.37508696853 2004 32.9654106280193 2005 34.6237532319236 2006 39.0545850802075 2007 42.352319898740895 2008 89.12228460990819 2009 42.1461592220581 2010 47.5507241403989 2011 48.8155339682099 2012 31.3873710052944 2013 27.3381362199513 2014 23.5883467691483 2015 23.112033405974 2016 23.3842740339813 2017 29.8801633213924 2018 33.3074 2019 28.8446 2020 39.9306 2021 29.3526 2022 41.451