Year	% of total exports
1995	20.65511640498105
1996	19.60465985792156
1997	19.937387330578574
1998	19.76137849893483
1999	20.195489357808672
2000	25.12652844700094
2001	22.743879300465693
2002	21.865127921334597
2003	22.27047944663178
2004	22.21174889012324
2005	22.906577703843027
2006	20.87056675448077
2007	22.32142604173984
2008	23.196828937529006
2009	20.56348504063925
2010	19.386275189665803
2011	18.787794275727617
2012	18.32638815530448
2013	20.049953708819988
2014	18.941309650646456
2015	19.87635987561516
2016	20.260349349178842
2017	19.362780538123076
2018	18.96087114226892
2019	18.832129285000565
2020	7.396700816634655