Year	% of GDP
1972	12.425427272140741
1973	13.411271028325833
1974	14.16059750468065
1975	14.878014982365837
1976	16.362093037118495
1977	16.284391083751743
1978	16.667989592420245
1979	16.246010635570972
1980	16.30567795337024
1981	16.2619844936061
1982	16.629094827904538
1983	16.938524886416218
1984	17.187872922747573
1990	14.503594932674705
1991	14.501290476068974
1992	14.835778604772793
1993	15.10079974003014
1994	15.546850369373843
1995	16.148007677170234
1996	16.513077209751597
1997	16.40541742924187
1998	17.115503297755225
1999	16.87262041185285
2000	18.022547812306875
2001	17.122183603632593
2002	17.215689535825522
2003	16.998213419681534
2004	16.71474666110175
2005	16.81613465777268
2006	16.709566252590076
2007	16.40804519180932
2008	17.24060045586602
2009	17.233435618830235
2010	17.068989752519386
2011	17.29016618870723
2012	17.163979150678216
2013	17.365349656918504
2014	17.13224845856043
2015	17.746151413927656
2016	17.450134877027526
2017	18.154632370007633
2018	17.675465008469736
2019	17.906411725807015
2020	17.89321659582682
2021	18.475882214520077
2022	17.393952417122822