Year	Percent of GDP
1997	17.986
1998	18.101
1999	19.089
2000	19.759
2001	21.027
2002	21.748
2003	21.355
2004	20.232
2005	18.776
2006	17.769
2007	17.168
2008	16.797
2009	15.254
2010	18.836
2011	17.165
2012	16.506
2013	16.729
2014	18.095
2015	19.84
2016	19.685
2017	18.916
2018	20.42
2019	22.784
2020	24.599
2021	22.154
2022	22.146
2023	20.501
2024	21.804