|
| year | imports | change |
| 1980 | 6,213.73 | NA |
| 1981 | 7,760.27 | 24.89 % |
| 1982 | 6,883.94 | -11.29 % |
| 1983 | 8,266.23 | 20.08 % |
| 1984 | 8,022.62 | -2.95 % |
| 1985 | 9,284.77 | 15.73 % |
| 1986 | 9,381.77 | 1.04 % |
| 1987 | 10,331.96 | 10.13 % |
| 1988 | 9,733.41 | -5.79 % |
| 1989 | 10,468.65 | 7.55 % |
| 1990 | 10,541.40 | 0.69 % |
| 1991 | 6,656.86 | -36.85 % |
| 1992 | 8,033.65 | 20.68 % |
| 1993 | 4,035.56 | -49.77 % |
| 1994 | 4,827.02 | 19.61 % |
| 1995 | 5,298.81 | 9.77 % |
| 1996 | 5,309.83 | 0.21 % |
| 1997 | 5,994.37 | 12.89 % |
| 1998 | 4,541.52 | -24.24 % |
| 1999 | 2,913.41 | -35.85 % |
| 2000 | 3,370.87 | 15.70 % |
| 2001 | 4,015.72 | 19.13 % |
| 2002 | 4,668.29 | 16.25 % |
| 2003 | 4,738.84 | 1.51 % |
| 2004 | 5,295.50 | 11.75 % |
| 2005 | 5,288.89 | -0.12 % |
| 2006 | 5,094.88 | -3.67 % |
| 2007 | 6,687.72 | 31.26 % |
| 2008 | 4,645.14 | -30.54 % |
| 2009 | 1,930.15 | -58.45 % |
| 2010 | 2,249.82 | 16.56 % |
| 2011 | 2,880.34 | 28.03 % |
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