Year	Percent of GDP (Units)
1988	33.210
1989	32.526
1990	31.933
1991	33.892
1992	30.647
1993	27.667
1994	42.217
1995	32.869
1996	27.730
1997	30.989
1998	28.790
1999	26.105
2000	28.293
2001	31.899
2002	30.990
2003	32.175
2004	31.914
2005	33.530
2006	39.267
2007	35.949
2008	34.879
2009	33.269
2010	31.099
2011	39.361
2012	38.007
2013	36.451
2014	31.607
2015	22.948
2016	19.686
2017	21.766
2018	37.174
2019	20.065
2020	9.517
2021	11.880
2022	14.305
2023	14.380