2011

7.4

2002

5.7

2009

6.0

2000

5.1

1996

5.8

1992

6.3

2017

7.3

1999

6.8

1990

6.5

2008

5.4

1975

7.3

1984

6.3

1961

7.0

1959

8.2

2024

7.3

2012

6.4

2006

4.9

1979

6.1

1998

6.8

1999

7.3