1965

6.8

2011

6.9

2013

7.3

1964

7.0

1974

7.0

1998

6.2

2010

6.6

2002

7.1

1976

7.3

1955

7.2

2013

8.0

2001

6.6

2008

5.7

1986

6.7

2007

7.4

1976

7.3

1980

7.3

2019

6.4

1994

7.6

1964

6.9