Year	Percent of GDP (Units)
1990	17.025
1991	16.532
1992	17.230
1993	18.875
1994	19.629
1995	18.604
1996	20.080
1997	20.209
1998	20.479
1999	21.088
2000	20.715
2001	19.410
2002	18.163
2003	16.323
2004	16.125
2005	14.934
2006	14.440
2007	16.135
2008	17.564
2009	15.759
2010	15.915
2011	17.622
2012	17.161
2013	16.877
2014	17.174
2015	17.299
2016	18.559
2017	18.870
2018	17.553
2019	17.777
2020	17.404
2021	16.815
2022	16.592
2023	18.640
2024	18.475
2025	19.150
2026	19.509
2027	19.768
2028	19.796
2029	19.848