Year	Percent of GDP (Units)
1997	72.194
1998	71.184
1999	68.183
2000	63.769
2001	60.613
2002	64.097
2003	60.245
2004	57.474
2005	58.203
2006	56.688
2007	53.550
2008	55.140
2009	59.666
2010	57.720
2011	59.413
2012	62.144
2013	70.391
2014	71.992
2015	73.716
2016	73.324
2017	71.895
2018	69.472
2019	67.368
2020	75.772
2021	75.218
2022	65.546
2023	60.019
2024	58.022
2025	57.024
2026	56.473
2027	55.827
2028	54.734
2029	55.320