2005

7.7

2015

7.5

2017

6.9

2017

0.0

2007

7.9

1998

7.2

1970

5.0

1964

7.4

1987

8.1

1925

7.6

1984

8.1

2001

6.9

2005

6.8

2014

6.8

1976

5.8

2008

5.5

1977

0.0

1975

7.5

1936

6.4

1959

7.2