Year	Percent of GDP (Units)
1997	19.183
1998	16.991
1999	17.150
2000	20.605
2001	20.312
2002	20.691
2003	18.690
2004	20.781
2005	21.834
2006	22.837
2007	22.124
2008	21.364
2009	22.863
2010	22.043
2011	21.380
2012	18.735
2013	19.247
2014	19.222
2015	20.991
2016	21.970
2017	23.169
2018	25.035
2019	25.610
2020	22.763
2021	18.727
2022	15.371
2023	17.742
2024	17.282
2025	15.967
2026	14.219
2027	14.726
2028	15.346
2029	15.798