2009

8.4

1975

6.4

2013

8.4

2008

7.7

2004

5.7

1977

6.4

2000

7.4

1988

6.1

1999

5.1

2021

6.9

1967

7.0

1988

6.3

1966

6.5

2003

5.7

1999

5.8

1970

7.7

1960

7.2

2018

5.7

2022

6.2

1990

5.8