Year	Percent of GDP (Units)
1980	28.141
1981	29.436
1982	26.139
1983	23.209
1984	18.945
1985	20.128
1986	16.332
1987	14.336
1988	11.520
1989	13.431
1990	14.284
1991	15.717
1992	12.760
1993	15.973
1994	13.485
1995	13.715
1996	16.703
1997	18.348
1998	28.243
1999	22.852
2000	17.322
2001	16.204
2002	19.850
2003	22.143
2004	19.269
2005	21.040
2006	18.649
2007	15.613
2008	23.423
2009	19.019
2010	18.738
2011	20.999
2012	17.272
2013	27.634
2014	20.887
2015	22.418
2016	21.116
2017	21.424
2018	21.049
2019	19.648
2020	16.722
2021	21.731
2022	18.436
2023	18.915
2024	19.481
2025	19.500
2026	19.639
2027	19.571
2028	19.740
2029	19.683