1970

5.6

1925

6.9

2000

6.4

2003

7.2

1999

6.6

2007

7.2

1998

7.5

1992

6.6

1964

6.2

1983

7.4

2002

6.6

1965

6.1

1966

6.1

2016

6.1

1988

5.0

1997

6.3

1984

6.8

1967

7.3

1994

6.7

1964

6.3