1989

6.6

2008

5.4

2017

0.0

2009

6.9

1967

7.4

2014

7.4

1996

7.3

1993

6.7

2006

7.0

1984

8.0

2000

6.1

1962

7.6

2005

5.5

1989

7.7

1995

9.0

2001

6.8

1975

7.1

2018

8.0

2020

6.6

2006

6.3