1994

5.1

2008

6.6

2003

5.3

1985

6.5

1981

5.4

2004

6.2

1980

5.6

2008

5.0

2021

5.1

1964

7.2

2025

4.5

2015

6.8

1991

6.5

1984

6.3

1974

7.9

1987

7.1

1980

7.7

1986

4.0

1999

6.3

2000

6.6