1988

6.2

1974

6.6

1987

6.0

1991

6.7

2011

5.6

2007

5.7

2011

6.4

1966

6.2

1993

6.5

2022

6.3

1982

6.5

1972

7.1

2002

7.7

2012

5.8

1985

7.2

2005

5.7

1966

6.8

1954

6.7

2001

5.2

1986

6.2