1965

6.1

1994

3.9

2008

5.4

1976

7.2

2002

4.4

1985

6.3

2004

5.2

1993

6.0

1988

5.9

2005

5.0

2003

5.3

2015

5.7

2019

5.0

1997

6.4

2003

6.3

1982

7.2

2001

6.8

1988

4.9

2022

7.0

1987

6.2