1929

7.4

1975

6.4

2003

6.0

2010

5.8

1990

7.2

1997

6.2

1903

7.0

1996

5.8

1977

6.8

1980

6.3

1990

6.0

2016

6.8

1959

7.7

2002

6.5

1986

7.1

1986

7.0

1904

7.2

2003

7.2

2010

7.0

1983

6.8