Year	% of GDP
1972	32.946672411481494
1973	31.260602529703814
1974	32.04061468509602
1975	29.947023363523996
1976	29.68181661134455
1977	30.18483163626524
1978	31.543142439121972
1979	32.35603341886271
1980	33.111178625221974
1981	33.00305399228033
1982	32.35263818592624
1983	33.89346828102151
1984	35.68429111747659
1985	37.12885753763289
1986	39.14794924725296
1987	38.775166092110005
1988	38.815367226075885
1989	37.973363581438534
1990	36.70041199456841
1991	35.49545154374711
1992	36.74277238786782
1993	38.54744831046211
1994	38.782265632314655
1995	38.54739270271151
1996	39.12212620790121
1997	38.395490407937274
1998	38.587251351248995
1999	38.757709137179646
2000	38.4774718178945
2001	37.46599906411705
2002	36.83483458530982
2003	36.73746611835185
2004	38.50582289000886
2005	40.058596549548156
2006	38.70316834998404
2007	41.1695049379482
2008	40.088318721806104
2009	39.62889238367646
2010	39.85895387427349
2011	40.505375993760474
2012	40.61773532856178
2013	40.578863001589724
2014	42.672266259524264
2015	39.49785365180467
2016	38.68008450852335
2017	38.984477565496434
2018	38.04552514013314
2019	40.320303360666934
2020	40.14305763203344
2021	41.345580839489216
2022	36.42587318367907