1975

8.4

1937

10.0

2009

0.0

2006

7.2

2016

6.4

2002

6.6

2001

7.2

2002

7.6

2002

6.9

1978

7.5

1952

7.9

1997

7.0

1996

6.4

1968

7.1

1973

6.9

1964

5.0

2007

5.8

1975

0.0

2006

6.1

2007

6.7