1995

6.2

1997

6.2

2005

5.9

2020

0.0

2018

7.2

2005

4.2

2008

4.7

1989

6.3

1990

6.5

2001

6.5

1965

6.8

1967

6.7

1970

4.3

1995

6.3

2000

6.0

2003

5.3

2008

4.8

1998

6.6

1994

6.6

2004

7.3