Year	Percent of GDP (Units)
1990	33.331
1991	35.092
1992	39.487
1993	44.372
1994	47.079
1995	50.009
1996	51.353
1997	53.685
1998	55.950
1999	52.697
2000	52.238
2001	51.093
2002	57.712
2003	56.872
2004	57.818
2005	54.908
2006	48.482
2007	44.772
2008	44.819
2009	43.102
2010	41.469
2011	41.890
2012	42.579
2013	41.967
2014	42.066
2015	42.154
2016	40.943
2017	41.760
2018	39.790
2019	39.639
2020	43.215
2021	41.094
2022	37.640
2023	38.316
2024	36.732
2025	35.577
2026	34.320
2027	33.294
2028	32.097
2029	31.131