1964

7.3

1953

7.3

1973

6.5

2004

7.9

1983

6.1

1981

6.5

1979

6.2

1986

6.1

2007

7.0

2001

6.4

1974

6.4

2002

6.0

2003

5.9

2008

6.9

2014

7.8

1998

6.9

2022

5.6

1999

6.3

2015

6.8

1989

6.4