Year annual % 1981 12.4424368936176 1982 10.2217271376892 1983 8.66927159808522 1984 8.08032017255761 1985 6.80756655768333 1986 5.822666961752 1987 5.71011938486679 1988 7.113406529313471 1989 6.92390503711238 1990 8.06346090938833 1991 8.99693873494331 1992 7.636108523369745 1993 7.14458706876256 1994 10.2479355556119 1995 9.07738095238091 1996 6.526095693725795 1997 5.554129889494055 1998 5.09729149331441 1999 3.04194667094533 2000 3.43351563418767 2001 3.836572620525435 2002 2.907998570322075 2003 3.02504526252236 2004 3.51799903099596 2005 4.10725070715931 2006 4.2671746339026395 2007 4.810237043429115 2008 8.94995335353387 2009 2.860448559026715 2010 3.32634463368643 2011 4.822396360133251 2012 3.72532666110646 2013 2.65167342916577 2014 2.35449052820358 2015 1.44385719270808 2016 1.605539174142135 2017 2.25427651934813 2018 2.450362438501695 2019 2.20607305781525 2020 1.93694126694223 2021 3.44527766461135 2022 7.98518671835033 2023 5.80113321465538