1966

5.6

1995

5.9

2017

7.6

2003

6.1

1990

6.1

1974

6.5

1933

6.9

2014

7.7

1989

6.1

2002

6.5

1989

5.9

1992

5.8

2006

7.0

1971

7.3

2008

5.2

1992

6.6

1999

5.1

1987

8.0

2012

6.1

2014

6.6