1975

3.1

1989

6.2

2009

6.0

2004

5.8

1987

3.0

2017

0.0

1992

6.7

2016

5.7

1976

4.6

2001

6.9

1992

5.3

1960

7.8

2004

4.9

2024

6.8

1979

7.1

2009

8.0

2007

5.2

2022

6.9

1996

6.2

2013

5.0