Year	Percent of GDP (Units)
1997	30.300
1998	36.751
1999	37.108
2000	33.838
2001	32.685
2002	31.535
2003	29.680
2004	30.155
2005	28.892
2006	29.191
2007	29.309
2008	31.726
2009	32.679
2010	29.387
2011	28.923
2012	28.229
2013	29.193
2014	31.729
2015	30.758
2016	29.139
2017	29.162
2018	29.077
2019	29.075
2020	32.552
2021	32.124
2022	30.445
2023	29.059
2024	29.881
2025	30.009
2026	30.306
2027	30.228
2028	30.358
2029	30.358