1995

6.7

1993

7.0

1958

6.3

2017

7.0

2007

6.4

2003

6.9

2005

6.7

1982

6.7

2006

5.8

2007

6.1

1993

7.2

1953

7.3

1964

7.6

2011

3.8

2014

5.4

1996

6.0

2003

6.1

1936

5.2

1970

5.7

1950

6.1