Year	% of total exports
2002	64.4062799597727
2003	68.23151304396922
2004	73.67118693863218
2005	69.9804489250855
2006	72.6020862687647
2007	76.98402440067719
2008	82.04721587869126
2009	89.57678297773654
2010	91.89207568039137
2011	93.48600243899037
2012	93.33906404363852
2013	93.65198591171269
2014	92.32754181310115
2015	89.40816001196683
2016	90.19220466237013
2017	90.18823705992448
2018	90.90857744388288
2019	90.36223240718502
2020	60.61063231665522