1999

6.6

2015

5.4

1995

4.6

1998

5.6

1997

5.3

1989

6.5

1990

7.4

2001

7.6

1999

7.9

1994

5.0

1984

6.5

1992

4.6

2021

0.0

1979

7.0

1999

7.9