1932

7.3

1996

3.1

2007

4.3

2004

6.4

1921

6.3

1982

5.4

2016

3.0

2010

3.9

1998

6.8

1975

7.5

1939

6.7

1971

5.3

1964

6.1

1970

5.9

1972

4.7

2003

7.0

1999

4.3

2005

2.4

1997

6.1

2017

4.5