1987

5.4

2001

6.9

2006

5.1

2000

7.1

1968

0.0

1931

3.0

1977

7.4

1942

6.2

2003

6.6

2002

6.9

1950

6.8

1988

5.8

2001

6.8

1995

7.3

2014

5.4

2002

6.1

2007

6.9

1937

5.8

1938

4.5

1934

6.1