Year	% of GDP
1995	21.48254588795154
1996	14.12391471442372
1997	16.024955632553027
1998	23.15194050638174
2002	23.980739559274948
2003	24.24588911939422
2004	24.55080199306994
2011	23.900319385156664
2012	23.05071011568782
2013	22.304949509389633
2014	24.525098096831876
2015	24.738150200758973
2016	24.27857375215538
2017	25.73312879238815
2018	25.477467319917952
2019	25.141385879824284
2020	23.824036514405638
2021	25.18865625245228