2001

7.8

1988

7.2

1993

7.2

1972

7.7

2006

7.3

1971

4.7

1996

6.8

2019

2.0

2015

2.0

1976

7.0

1997

7.3

1997

6.9

2005

6.2

2016

6.7

1997

7.4

2004

5.6

2014

4.7

1960

6.9

2005

6.7

2000

5.3