|
| year | imports | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 3.01 | NA |
| 1987 | 3.43 | 13.84 % |
| 1988 | 3.42 | -0.27 % |
| 1989 | 3.43 | 0.27 % |
| 1990 | 3.96 | 15.42 % |
| 1991 | 3.45 | -12.88 % |
| 1992 | 3.04 | -11.82 % |
| 1993 | 3.07 | 0.87 % |
| 1994 | 3.08 | 0.60 % |
| 1995 | 3.10 | 0.59 % |
| 1996 | 3.09 | -0.27 % |
| 1997 | 3.10 | 0.27 % |
| 1998 | 3.10 | 0.00 % |
| 1999 | 3.10 | 0.00 % |
| 2000 | 3.18 | 2.66 % |
| 2001 | 3.19 | 0.27 % |
| 2002 | 3.23 | 1.14 % |
| 2003 | 3.23 | 0.00 % |
| 2004 | 3.26 | 0.85 % |
| 2005 | 3.34 | 2.51 % |
| 2006 | 3.30 | -1.09 % |
| 2007 | 3.34 | 1.10 % |
| 2008 | 3.36 | 0.63 % |
| 2009 | 3.39 | 0.79 % |
| 2010 | 3.39 | 0.00 % |
|
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