Year	% of GDP
1972	10.429447852760736
1973	11.312820209079872
1974	13.233096750093388
1975	13.272691318963812
1976	12.918075607595672
1977	12.272036274308679
1978	12.402180603182977
1979	13.267593847383639
1980	13.543635591486103
1981	13.756084920502712
1982	13.55969721259848
1983	13.378997416469465
1984	12.584027532083239
1985	13.6495891082001
1986	14.652950532395737
1987	11.890216789553337
1988	11.234666246319618
1989	11.578810740456513
1990	12.721040996496882
1991	11.23762476357462
1992	11.710202032056548
1993	10.709639700669364
1994	9.984833330150172
1995	9.711029866840216
1996	10.362808129666071
1997	12.919618069772012
1998	13.429665703552224
1999	16.32916613471869
2002	15.713445587285863
2003	16.2579278221086
2004	16.85393654798434
2008	18.448565088813428
2009	15.36729839762175
2010	14.01209717218333
2011	15.024657399914144
2012	15.6134649232689
2013	15.375019877156554
2014	15.905365896634791
2015	14.50131829373632
2016	14.87298420776757
2017	14.299029098990726
2018	14.819096363431274
2019	14.494688750263284
2020	16.540027603839235
2021	15.509162804403203
2022	15.803950849422844