2011

5.2

2019

7.1

1999

7.3

2010

6.2

1969

8.3

1959

8.0

1989

9.3

1975

6.2

2004

4.8

2015

6.1

1994

7.9

1994

6.5

1967

6.8

1999

7.7

1994

7.0

2003

6.1

2012

5.9

1948

7.1

1959

7.6

2014

6.3