Year	Percent of GDP (Units)
1981	41.916
1982	42.647
1983	42.756
1984	43.532
1985	43.906
1986	39.187
1987	39.125
1988	38.018
1989	40.882
1990	42.334
1991	39.667
1992	21.023
1993	24.953
1994	22.440
1995	21.629
1996	21.739
1997	22.740
1998	23.851
1999	23.294
2000	28.707
2001	30.857
2002	30.765
2003	30.282
2004	30.202
2005	27.548
2006	33.778
2007	37.939
2008	33.107
2009	30.255
2010	32.001
2011	33.918
2012	29.816
2013	31.224
2014	28.418
2015	26.134
2016	24.382
2017	28.461
2018	31.260
2019	31.822
2020	27.884
2021	32.846
2022	34.394
2023	35.298
2024	34.736
2025	33.425
2026	33.385
2027	33.185
2028	33.001
2029	32.948