1955

7.5

1999

7.3

1998

6.2

1995

6.1

1988

5.5

1990

5.0

1956

5.5

2008

6.9

1969

3.6

1939

0.0

1970

0.0

1999

0.0

2006

5.4

1994

7.0

1990

6.8

2015

6.8

1940

3.0

1972

7.4

2012

3.5

2023

0.0