Year	Percent of GDP (Units)
1997	21.103
1998	17.567
1999	21.807
2000	24.344
2001	28.243
2002	27.896
2003	30.267
2004	31.563
2005	32.185
2006	31.414
2007	30.274
2008	31.470
2009	34.828
2010	35.007
2011	36.460
2012	37.322
2013	37.012
2014	35.606
2015	34.059
2016	33.481
2017	32.631
2018	32.031
2019	30.842
2020	30.251
2021	28.356
2022	25.607
2023	23.152
2024	20.614
2025	18.408
2026	16.412
2027	14.580
2028	12.891
2029	11.390