Year annual % 1990 2.81240371323102 1991 2.87662448038799 1992 3.42452455952036 1993 3.99323192277686 1994 2.09430477567447 1995 1.22076958003412 1996 0.476619740910181 1997 0.757624410107738 1998 1.80564350098564 1999 0.598897782801686 2000 2.01461738713986 2001 1.98280272084908 2002 1.64000779519797 2003 1.85008868250355 2004 1.91499094831144 2005 2.08307421275387 2006 2.26470714433403 2007 1.93172111672469 2008 1.90884542543854 2009 0.533179397971551 2010 1.89207786027008 2011 1.8072994675872 2012 1.9611193413831 2013 1.27125815498337 2014 0.982645554501687 2015 1.33038612835179 2016 1.92085069495049 2017 1.83027279601211 2018 1.54983152485374 2019 1.76809741631743 2020 1.59949090729611 2021 3.17199355026897 2022 5.89170297905721 2023 4.07987410659135