2014

6.9

2005

6.7

2000

8.1

1998

0.0

1986

7.9

1970

7.2

1984

8.0

2002

7.0

1991

7.5

1988

7.8

1940

7.8

1957

8.1

1927

7.8

2016

6.0

2003

7.4

1973

7.9

2001

7.1

1969

5.1

1984

5.8

2015

7.5