Year	Percent of GDP (Units)
1988	23.965
1989	31.619
1990	35.771
1991	31.616
1992	24.279
1993	24.746
1994	31.030
1995	27.005
1996	35.670
1997	33.566
1998	24.301
1999	26.847
2000	32.743
2001	27.305
2002	29.508
2003	32.347
2004	34.385
2005	37.625
2006	37.662
2007	33.134
2008	31.418
2009	24.584
2010	26.359
2011	31.117
2012	28.151
2013	26.099
2014	21.798
2015	14.885
2016	11.223
2017	8.493
2018	6.884
2019	10.090
2020	4.526
2021	7.250
2022	8.274
2023	10.989