1973

7.4

1983

6.1

2006

6.7

1938

6.2

1973

7.5

2007

6.3

1995

6.9

2007

5.6

2001

6.2

1996

7.2

2015

6.0

2016

5.0

1994

7.0

2006

5.2

2017

4.7

1998

5.8

2004

5.6

1990

5.8

1991

7.2

1924

7.4