1998

5.4

1974

6.1

1975

6.9

1995

6.5

1997

6.8

2008

6.7

1993

7.9

2016

5.7

1972

5.8

1944

5.8

1955

6.5

1997

7.7

1998

6.2

2014

6.0

1986

4.2

2009

6.7

2003

6.7

1949

7.3

1996

0.0

1997

0.0