Year	% of GDP
1999	17.291046923484743
2001	20.56332372677596
2002	17.45095129860549
2003	17.33071610243404
2004	18.374085645598207
2005	18.833772477679577
2006	21.08928820394849
2007	20.92112611354823
2008	21.651170805676138
2009	16.974084125466717
2010	16.908871250644843
2011	17.50782419430365
2012	17.652595217432314
2013	17.749641452889897
2014	17.884642521626986
2015	17.133643979706868
2016	16.750574365550488
2017	17.416017341050164
2018	17.276181368713928
2019	18.053999088090745
2020	18.056619742869874
2021	19.34022171943519