1994

7.1

1991

6.9

2004

5.5

1975

6.9

1987

7.0

1978

0.0

2006

7.8

2005

8.2

1999

7.6

1990

6.6

1983

6.0

1969

8.2

1987

7.4

1984

7.4

2020

7.3

1976

0.0

1967

7.5

1999

7.5

1996

6.3

2001

6.6