1972

6.2

1927

8.1

1991

7.5

1998

7.3

2005

7.1

1984

5.3

1967

5.5

1995

6.0

2004

5.9

2006

7.1

1998

5.4

1992

5.3

2007

5.8

1984

6.9

1984

5.6

1991

7.4

2019

7.7

1980

7.0

1972

7.2

1996

6.3