1999

6.8

1948

8.0

1986

7.7

2007

6.3

2015

5.8

2016

4.0

1973

7.4

1964

6.2

1953

7.7

1957

8.2

1995

8.0

2006

6.1

1924

7.4

2005

6.2

2020

6.6

1985

8.1

2000

7.1

2015

6.7

1994

7.2

2009

5.5