2013

6.3

2005

4.6

1959

8.1

1951

7.4

1989

6.2

1993

6.3

1933

7.6

1975

6.0

1952

6.7

1959

7.3

2016

6.2

2012

5.5

2007

7.0

1957

6.6

1981

6.6

1956

6.1

1998

8.8

1992

7.5

1964

6.3

2017

6.0