1990

6.6

1996

6.7

2004

7.2

1972

7.4

1992

6.6

1984

2.0

1993

6.9

1975

10.0

1971

0.0

1929

6.6

2002

7.1

1948

7.9

2016

6.2

1961

7.3

2005

6.8

1976

0.0

2000

6.5

2007

6.1

1994

5.1

1927

5.9