Year	Percent of GDP (Units)
1981	18.592
1982	19.139
1983	18.149
1984	17.091
1985	17.546
1986	17.763
1987	16.770
1988	16.905
1989	17.028
1990	17.257
1991	17.332
1992	17.673
1993	18.653
1994	19.125
1995	19.941
1996	21.123
1997	22.185
1998	22.527
1999	23.127
2000	24.219
2001	24.609
2002	24.810
2003	25.178
2004	25.499
2005	26.357
2006	26.678
2007	26.737
2008	26.791
2009	26.805
2010	26.828
2011	28.010
2012	28.852
2013	28.939
2014	29.137
2015	29.442
2016	30.240
2017	30.947
2018	31.823
2019	32.214
2020	31.308
2021	31.019
2022	32.047
2023	31.254
2024	30.423
2025	32.217
2026	33.081
2027	33.891
2028	34.508
2029	35.096