1937

7.2

2003

5.9

1955

0.0

1997

5.0

1993

7.5

2005

6.7

1981

6.7

1989

7.0

1947

5.9

1981

5.9

2008

6.7

2016

6.6

2004

6.8

2018

7.1

2020

8.0

1997

5.0

2005

5.7

1964

7.4

1959

6.9

1993

5.0