2017

4.3

2020

6.5

1996

5.1

1999

5.6

1976

6.9

1997

6.7

1993

4.5

1971

7.2

1997

5.7

1996

5.4

2007

5.5

1933

8.4

1989

6.2

2015

0.0

1980

7.0

1983

6.1

1994

5.8

1996

5.7

1988

6.2

1962

6.8