Year annual % 1990 22.7971969560272 1991 25.6171132056879 1992 29.3415325636948 1993 49.8968148656193 1994 33.9314865991286 1995 37.9374945080193 1996 28.8336457238958 1997 15.5280864957216 1998 9.38151715778559 1999 31.7078471448764 2000 24.9292605173053 2001 14.8054189526999 2002 28.2796940893818 2003 13.1363946157608 2004 24.7082423900547 2005 20.1661916084688 2006 14.5825930244323 2007 22.9390613586981 2008 19.4219808649055 2009 4.59851691322106 2010 15.882625978134 2011 23.7429753738831 2012 18.9538841448282 2013 36.775631886208 2014 9.75876873256327 2015 0.197001678736839 2016 9.39978461338336 2017 13.0353311671579 2018 31.6411842965085 2019 30.5348662272656 2020 44.2649836337424 2021 56.3196546439665 2022 50.585248062505 2023 32.9092849770248