1993

6.2

2017

6.0

1991

8.3

1996

7.9

1972

6.2

2008

6.6

2014

5.3

2014

4.4

1971

7.5

2003

7.0

2005

6.3

1993

5.5

1999

7.0

2000

6.3

2012

5.4

1991

1.0

1985

6.0

2021

6.0

2015

4.9

1997

6.9