1984

7.1

2001

7.9

2001

6.7

2010

4.6

1973

9.2

1997

6.2

1973

6.3

1988

5.4

1993

6.3

1990

5.5

2020

6.4

2008

7.4

2012

5.9

2011

6.6

2009

4.5

2008

7.5

2005

5.2

1998

7.0

1995

5.6

1991

7.0