1962

7.3

1994

4.8

1995

5.4

1973

6.9

1923

6.8

1999

6.5

2012

7.2

1980

5.8

1964

7.2

1967

7.3

2002

6.1

2018

7.1

1996

5.7

1977

6.6

1997

6.2

2007

6.1

1955

7.9

1982

6.8

2015

6.5

1993

5.0