Year annual % 1991 228.33678176638165 1992 942.3065691154022 1993 306.1944450789254 1994 61.63525400952864 1995 38.04574232605236 1996 18.990528161101096 1997 11.448689124975274 1998 3.351437030211372 1999 -1.256892196249055 2000 1.2985383464518634 2001 -0.3218106014118405 2002 0.31865660761221193 2003 -0.8134945034894656 2004 2.68179721009696 2005 6.885108591357664 2006 6.735585151556208 2007 8.554585618706412 2008 9.709108571738128 2009 -3.2960387737051633 2010 2.5334836604555164 2011 5.349952297957714 2012 2.7342534936863956 2013 1.2813322272774457 2014 0.8335920642486627 2015 0.06368279146693112 2016 1.57625277213522 2017 4.243431789648071 2018 3.527174275347562 2019 2.771563062854753 2020 1.8919647601098148 2021 6.547275517766906 2022 16.558732136735117 2023 7.106523723094369