Year % of total employment (modeled ILO estimate) 1991 3.6958108390015 1992 3.59948978416884 1993 3.50947689027665 1994 3.25877005255158 1995 3.17017809446839 1996 2.93478014245439 1997 2.94220627980605 1998 2.77992601015129 1999 2.86390678702633 2000 2.63752420510373 2001 2.61599128687915 2002 2.48709621334854 2003 2.42462617205749 2004 2.35515500435497 2005 2.37341299771191 2006 2.26795908739699 2007 2.25852668639427 2008 1.78449337938675 2009 1.68237970672288 2010 1.64715967121532 2011 1.64437977040806 2012 1.56060771940157 2013 1.44623947429666 2014 1.42827209108463 2015 1.39399470572749 2016 1.30827844690257 2017 1.27662149309967 2018 1.24953993817278 2019 1.20414876282371 2020 1.22072211603765 2021 1.25058599112073 2022 1.24058627959026