1968

6.9

1992

6.4

1966

6.1

2022

6.1

2015

6.4

2006

6.6

1985

6.1

2003

6.6

1993

6.6

1994

6.6

1991

6.5

1997

5.9

2012

7.2

2011

7.4

5.4

1988

5.5

1975

7.0

1982

6.7

2009

5.8

2015

6.4