1999

5.0

1972

7.9

1946

7.8

2011

5.9

2007

6.9

1988

6.6

2015

6.4

2000

6.3

1976

6.7

2006

7.2

2002

5.8

2000

7.1

1988

5.2

1964

7.3

1946

7.4

1934

7.5

1925

7.6

1925

8.0

2004

6.0

2012

7.5