1976

2.0

1982

6.5

1986

5.5

1984

1.0

0.0

1991

6.7

1976

4.6

1996

4.0

2009

4.3

2023

7.2

2016

4.5

1983

5.4

2019

6.4

2001

5.1

2002

6.8

2001

7.0

1999

4.5

1968

5.5

1980

6.6

2004

5.6