|
| year | imports | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | .58 | NA |
| 1987 | .58 | 0.00 % |
| 1988 | .58 | -0.27 % |
| 1989 | .58 | 0.27 % |
| 1990 | .62 | 6.25 % |
| 1991 | .62 | 0.00 % |
| 1992 | .64 | 2.66 % |
| 1993 | .64 | 0.27 % |
| 1994 | .64 | 0.00 % |
| 1995 | .66 | 2.86 % |
| 1996 | .66 | -0.27 % |
| 1997 | .66 | 0.27 % |
| 1998 | .66 | 0.00 % |
| 1999 | .66 | 0.00 % |
| 2000 | .64 | -3.04 % |
| 2001 | .64 | 0.27 % |
| 2002 | .66 | 2.86 % |
| 2003 | .66 | 0.00 % |
| 2004 | .67 | 2.50 % |
| 2005 | .68 | 0.27 % |
| 2006 | .68 | 0.00 % |
| 2007 | .69 | 2.70 % |
| 2008 | .69 | 0.00 % |
| 2009 | .71 | 2.63 % |
| 2010 | .71 | 0.00 % |
|
|