Year	% of total merchandise exports
1960	3.2452073302106337
1961	3.2933847924707162
1962	3.9770385169137037
1963	4.443083605000914
1964	8.51228428303253
1965	9.959509988092305
1966	6.910274516435068
1967	5.827359763024987
1968	7.00185737340977
1969	7.7811217804814525
1970	7.783688045458287
1971	7.745165071366597
1972	8.7562931330118
1973	8.415489194756502
1974	6.790091358541038
1975	5.086608882137486
1976	3.9768214328091447
1977	4.056740069557434
1978	4.005157825931431
1979	3.5500742857215375
1980	5.358157812697061
1981	6.012301402945387
1982	6.138037164545542
1983	6.202095634901057
1984	5.947614143381416
1985	5.385300392448071
1986	6.042125047919444
1987	6.633224419098892
1988	6.272274488532611
1989	7.304849095588615
1990	7.846307779501492
1991	8.081585311955646
1992	9.284528627262482
1993	9.924598244161555
1994	10.705897209487405
1995	11.16307950138295
1996	11.16323320287273
1997	11.618403340840967
1998	12.220059925030275
1999	12.474983630325559
2000	14.48496255421421
2001	13.43428198847282
2002	15.166696130602855
2003	14.291388724098757
2004	14.24021617634905
2005	13.675116302624376
2006	13.62842999587559
2007	13.744925656148133
2008	12.893770441330602
2009	16.782340702069426
2010	17.417226626850653
2011	17.602329733294038
2012	18.766789845693086
2013	19.744869640203934
2014	20.07338064123014
2015	21.984186397368312
2016	22.884268571111438
2017	20.431975104372086
2018	19.09540952805274
2019	19.85028224997249
2020	20.44103760350883