1971

6.7

2001

8.9

2021

6.2

2020

6.7

1949

6.9

1996

7.5

1998

6.2

2013

5.5

2006

10.0

1966

6.5

1987

7.0

1989

7.3

1981

7.1

2010

6.9

2019

6.8

1999

7.6

2000

6.3

1921

6.8

1895

5.5

1996

7.2