Year % of total employment 1994 30.035017525556277 1995 30.55895996161141 1996 30.571888147564376 1997 29.6726815388128 1998 30.819585024039622 1999 29.185145025444143 2000 28.431462073061073 2001 29.121374080169737 2002 30.350040765162824 2003 30.4560140509857 2004 30.717476876693038 2005 30.139550719025305 2006 30.418335309515662 2007 30.459856395878457 2008 30.97443417371647 2009 32.27285537778777 2010 31.23667999346281 2011 31.728678751503658 2012 31.57352503581092 2013 31.676710538655513 2014 31.552781842523615 2015 31.79233702521097 2016 31.583531794556894 2017 32.3160571110146 2018 31.32095119989951 2019 31.215112403908744 2020 34.74164287301726 2021 32.42707489585103 2022 33.51038122668669 2023 33.61666475252472