2013

7.6

2008

6.2

2017

6.6

1998

6.1

1996

5.9

1984

7.3

1999

5.9

2024

7.1

1995

4.6

1996

6.0

2024

6.8

6.3

1980

6.4

1993

6.6

1996

6.5

1974

5.8

2012

9.8

1962

7.3

1974

6.6

1988

6.5