Year	% of GDP
1971	1.0522700548172
1990	2.07436990737915
1991	2.30833005905151
1992	2.24298000335693
1993	2.06511998176575
1994	2.26538991928101
1995	2.32975006103516
1996	2.14418005943298
1999	2.56853008270264
2000	2.5650200843811
2001	2.27981996536255
2002	2.40134000778198
2003	1.93705999851227
2006	2.55852007865906
2007	3.01462006568909
2008	2.72311997413635
2009	3.33588004112244
2010	2.7219500541687
2011	3.07762002944946
2012	3.1868200302124
2013	3.68952989578247
2014	5.10368013381958
2015	4.48669004440308
2016	2.95843005180359
2017	2.57818007469177
2018	3.457279920578
2019	3.52600002288818
2020	3.81900000572205
2021	3.82200002670288
2022	4.10099983215332