2015

6.7

2001

5.8

1995

7.3

2013

5.7

2003

6.3

1984

7.3

2013

7.5

2009

5.0

1985

8.3

2015

7.2

1961

7.8

2002

6.6

1963

7.7

1985

5.3

2011

6.1

1980

7.0

1986

7.6

2008

6.4

1967

6.6

1981

5.8