1997

0.0

1981

0.0

1990

6.7

1990

6.1

2007

6.3

1992

4.7

1989

5.9

1980

5.3

1977

5.6

1979

1.7

1982

6.6

2006

7.0

1986

5.7

1994

6.6

1934

7.5

2017

7.1

1955

7.3

1956

7.1

1988

7.5

1994

6.2