1994

6.5

2005

6.6

1989

5.1

2009

7.4

1982

7.4

1998

6.4

1994

7.5

1931

6.9

2013

8.1

2003

7.5

2007

7.1

2017

6.8

2002

4.6

1979

7.5

1964

7.4

2008

6.2

1987

7.2

2012

6.4

1984

6.6

1991

7.0