1988

6.8

2020

5.8

5.8

1990

6.5

2012

6.0

1959

8.1

1943

8.0

2009

5.0

1937

6.7

1969

7.6

1976

7.6

2020

6.2

1955

6.6

1982

7.6

1995

6.8

1978

8.0

2018

6.4

1970

6.8

1984

5.4

0.0