Annual % of GNI
1975 21.318431654665844
1976 21.125784192483707
1977 21.73001074246764
1978 22.097654903435277
1979 20.698901205609378
1980 18.40958454324922
1981 15.707097265735731
1982 15.831733886291003
1983 17.510302366548373
1984 19.3390705491452
1985 19.546304955508568
1986 20.70921805031836
1987 21.674249371182075
1988 21.893839987994717
1989 22.24765826725775
1990 23.450697584291873
1991 22.4466811909267
1992 22.861382630651796
1993 22.573536090825925
1994 22.16141418406115
1995 23.259356849120785
1996 23.39252830221726
1997 24.280187533537482
1998 23.80871452151803
1999 24.555790138152712
2000 25.53073838613892
2001 26.318070480101795
2002 25.5766452035792
2003 25.427907695910466
2004 25.776983195423732
2005 26.19690421896862
2006 27.315305398635296
2007 26.607075772389916
2008 26.591759962130098
2009 22.34357901787745
2010 24.231144014972266
2011 25.184150410336503
2012 25.173322897667823
2013 26.609511881781543
2014 27.98564610441542
2015 28.0140169768401
2016 28.836214174355604
2017 29.417614141105638
2018 29.07218044197773
2019 29.48932904376238
2020 29.623249842798447
2021 31.851567394400163
2022 36.05501089413322
2023 32.79252152555923