1989

7.2

2006

7.0

2004

4.6

2004

6.7

1992

6.9

1972

5.4

2013

4.3

1919

5.3

2012

7.3

1971

5.3

1988

7.5

1989

6.0

1994

6.8

1991

6.3

1995

5.4

1997

4.4

2005

4.5

1964

7.6

1955

7.4

2006

6.6