1975

6.7

1979

7.6

2010

7.5

2007

7.7

1970

6.7

1971

7.6

1974

7.1

2017

7.7

1978

7.0

2019

6.5

2022

7.5

1993

6.8

1973

6.6

2006

6.8

1991

6.2

2005

6.0

2002

6.1

2009

5.4

2022

6.9

1972

6.3