1963

7.7

2006

6.3

2001

6.5

1996

7.3

1932

6.9

1995

4.6

1999

5.7

1982

5.4

1987

6.7

1978

6.2

2007

7.3

1969

6.0

2008

6.7

2008

6.8

2021

5.7

1993

6.6

2019

5.2

2019

6.1

2011

6.0

1989

5.7