Year annual % 1986 9.32546190007652 1987 9.01351931463752 1988 10.219687503976544 1989 8.929941428940264 1990 8.488646496506956 1991 14.245844608747799 1992 10.639302189743852 1993 9.37034415971461 1994 25.1778762249963 1995 15.44802583525285 1996 9.33031458531928 1997 8.08400135486043 1998 8.01375518965603 1999 5.77736898687895 2000 4.03246711287498 2001 4.861164627559915 2002 5.03282275711195 2003 6.5592978291005 2004 4.63500759039375 2005 7.7974978178644 2006 6.92033580707587 2007 7.9051177898873 2008 11.3051098827019 2009 4.622947783237435 2010 5.51611298703742 2011 6.79138291952621 2012 6.377978656246565 2013 5.583583807098835 2014 4.40535234185293 2015 3.963943162112 2016 5.472022694060755 2017 4.97595150553892 2018 3.49445848856181 2019 3.3209062698037597 2020 4.4641443723286 2021 4.1862150652352 2022 9.573371185559575 2023 7.46597537029912