1993

5.8

1999

5.1

1935

6.5

1982

6.9

2011

7.1

2007

6.7

2019

7.7

1976

6.5

2003

5.7

2016

6.1

2005

6.0

1984

6.5

1950

6.5

1965

7.4

2006

6.0

1976

6.5

2010

6.0

2016

6.7

1998

6.0

2020

5.4