| Irlanda | ||
| 0 | 1981 | 0.00 |
| 1 | 1982 | 0.00 |
| 2 | 1983 | 0.11 |
| 3 | 1984 | 0.09 |
| 4 | 1985 | 0.20 |
| 5 | 1986 | 0.23 |
| 6 | 1987 | 0.68 |
| 7 | 1988 | 1.28 |
| 8 | 1989 | 1.62 |
| 9 | 1990 | 1.93 |
| 10 | 1991 | 2.04 |
| 11 | 1992 | 2.04 |
| 12 | 1993 | 2.11 |
| 13 | 1994 | 2.09 |
| 14 | 1995 | 1.47 |
| 15 | 1996 | 1.51 |
| 16 | 1997 | 0.82 |
| 17 | 1998 | 0.49 |
| 18 | 1999 | 0.67 |
| 19 | 2000 | 0.34 |
| 20 | 2001 | 0.67 |
| 21 | 2002 | 0.89 |
| 22 | 2003 | 0.98 |
| 23 | 2004 | 1.08 |
| 24 | 2005 | 1.16 |
| 25 | 2006 | 0.57 |