Year	Percent of GDP (Units)
1980	27.890
1981	24.228
1982	23.646
1983	22.037
1984	23.992
1985	24.041
1986	22.132
1987	22.789
1988	23.279
1989	22.799
1990	22.891
1991	22.631
1992	22.002
1993	19.253
1994	19.318
1995	20.042
1996	19.355
1997	19.502
1998	19.735
1999	20.233
2000	20.865
2001	20.843
2002	21.571
2003	21.179
2004	21.262
2005	21.169
2006	21.958
2007	22.246
2008	21.778
2009	19.509
2010	20.580
2011	20.468
2012	17.789
2013	16.892
2014	16.959
2015	17.107
2016	17.561
2017	18.054
2018	18.527
2019	18.240
2020	17.701
2021	21.738
2022	23.089
2023	20.917
2024	21.812
2025	21.922
2026	21.250
2027	20.774
2028	20.306
2029	20.163