Year annual % 1986 398.07308560005714 1987 362.55632118027546 1988 411.0402533111663 1989 69.68872535294352 1990 42.09509813221828 1991 72.54638459503857 1992 32.62918446063395 1993 17.414974629790663 1994 16.95231602776029 1995 17.040195419134193 1996 8.696767117435456 1997 6.597404781761469 1998 8.837864128138989 1999 5.734702829404654 2000 3.408827665276064 2001 2.622264784361377 2002 4.698928162019669 2003 7.109602462914808 2004 8.433312132090848 2005 18.810519570769742 2006 8.568947976037663 2007 9.630225612161183 2008 22.67331617461062 2009 6.215623151205676 2010 42.30326724885569 2011 21.41367928181772 2012 9.077660690250383 2013 4.038523637522758 2014 3.698137968088176 2015 -1.7165117074965508 2016 1.8195359277991372 2017 4.362920147664312 2018 3.6266473002725945 2019 2.423226942292672 2020 1.4674781481081425 2021 2.8807679290064243 2022 4.0512423171263094 2023 1.9062313018400232