1987

7.3

2000

6.3

1987

6.7

2007

7.0

1942

7.0

1992

4.7

1998

6.3

2023

6.5

1987

6.4

2001

6.3

1984

5.6

2020

7.2

2003

5.8

1978

6.6

1975

3.3

2008

6.5

1999

6.3

1999

6.4

2005

6.4

2004

6.2