1999 7.0

1999 7.8

1999 6.7

1999 6.4

1998 7.6

1998 7.2

1998 5.5

1998 8.6

1998 7.8

1998 7.1

1998 7.4

1998 7.4

1997 7.2

1997 6.9

1997 7.1

1997 7.6

1997 7.0

1997 7.3

1997 6.8

1997 6.0