2009

4.4

1988

5.8

2014

7.1

2001

7.9

1971

7.5

2019

7.1

1988

5.8

2004

7.1

1964

7.6

2002

6.3

1999

7.3

2007

6.5

1960

8.2

2003

6.0

2002

5.9

1987

7.1

2000

7.0

2012

5.4

1981

7.4

1998

6.6