Year % of commercial service imports 1977 17.69786516925412 1978 18.64396592596822 1979 23.489282822231196 1980 19.866472589027634 1981 16.785060673398544 1982 15.995081956758163 1983 17.958635739518016 1984 17.372789428409565 1985 18.90536244879187 1986 16.958173054358923 1987 16.74971238937071 1988 17.878071285271226 1989 17.69140780243439 1990 15.987469316865916 1991 18.05147822415696 2005 17.548317799379543 2006 17.306848637405004 2007 18.60037364069534 2008 17.39879607136443 2009 19.133026160998813 2010 20.656907978684202 2011 20.76538552737221 2012 19.367503121628946 2013 21.67583579315737 2014 21.38304633623938 2015 24.68777742522069 2016 27.43009503373278 2017 27.118879591929506 2018 26.051888851179925 2019 29.106242600932763 2020 19.67733282900272 2021 23.9567485188126 2022 27.97659284969182