Year	% of GDP
1987	36
1988	33.33333333333333
1989	35.714285714285715
1990	40
1991	45.76271186440678
1993	36.92614770459082
1996	49.42077419354839
1997	38.67686768676868
1998	45.494819578420866
1999	39.67090501121915
2000	34.738655944859275
2001	31.712661212037162
2002	27.55968169761273
2003	25.418735796650115
2004	23.053619615280414
2005	22.919594647556128
2006	19.501956492426626
2007	18.6
2008	31.7
2009	46.6
2010	51.88082719617165
2011	51.93184420572526
2012	47.199999999999996