1946

7.8

2002

6.2

2009

4.8

1975

7.2

2012

5.6

2010

5.8

1953

5.4

1927

7.8

1998

7.7

1968

6.3

2006

6.9

1993

7.2

1958

8.2

2004

7.8

1982

6.4

2010

7.8

2010

7.2

1990

7.3

1988

7.1

1955

7.4