1960

4.1

2002

7.9

1974

7.5

1985

6.6

1987

4.2

2001

5.9

1993

0.0

1989

8.1

1984

8.0

1980

7.3

2006

6.9

1995

7.1

1999

7.9

2007

7.5

1975

7.0

2019

6.2

1957

5.0

2007

7.3

1987

5.9

2022

6.9