1940

7.3

2017

6.7

1999

6.8

1942

5.2

2001

7.2

2006

5.8

2006

7.5

2014

6.4

1944

7.6

1999

7.4

1974

8.6

1990

7.2

2005

6.4

1972

7.1

1987

7.1

1997

7.5

1955

7.9

2000

4.8

1937

6.6

1980

6.2