Year	% of GDP
1964	15.976338377339614
1965	16.736869461915834
1966	16.708962620729505
1967	16.346137689868947
1968	18.057659572689435
1969	19.41608340613063
1970	18.859707286560763
1971	18.992226147723947
1972	21.6149010845308
1973	21.79892295153644
1974	18.14092795620541
1975	22.705275788298145
1976	23.228435067697454
1977	25.623151701864487
1981	31.675005005387394
1982	29.93766427153635
1983	29.572157725897792
1984	29.514814932540833
1985	30.603742974371386
1986	33.10146979794414
1987	34.903283138688835
1991	29.819570369820482
1992	21.444270556195917
1993	21.54982201001109
1994	22.7195724836877
1995	24.28173823026358
1996	23.6448132698153
1997	25.420906718678033
1998	29.038668217178607
1999	30.90227528453188
2000	33.45496553105137
2001	34.71483879107951
2002	34.61330783198885
2003	33.78439416971122
2004	31.29703486822165
2005	31.12315350757197
2006	32.69726677762443
2007	33.43046253456348
2008	31.41271833647711
2009	34.58705601283508
2010	38.448407563401204
2011	37.89524263043151
2012	36.59894136332302
2013	34.238094597142016
2014	36.93647743173273
2015	41.10067562863634
2016	45.332594327602536
2019	28.9434038314915
2020	33.59628099340186
2021	33.045208100404466