2008

6.7

2005

7.1

2018

6.5

1993

5.8

1931

4.2

2002

7.4

1984

7.2

1990

7.5

1993

7.8

1996

7.6

1997

7.7

1989

6.0

1962

7.2

2013

5.5

2000

6.2

1998

6.1

2006

7.7

1985

6.0

1962

5.1

2016

5.8