1961

7.6

1974

7.8

2019

6.3

2013

6.0

1971

7.6

2005

6.0

1976

7.0

2004

6.1

1983

5.0

2024

6.1

2001

6.9

2001

7.3

2000

3.0

1992

4.7

2000

7.4

2007

5.9

2007

3.8

1981

6.1

1987

5.7

2009

6.5