1977

5.6

1979

2.0

1955

7.3

1957

7.2

1956

7.1

2017

7.1

2007

6.3

1981

7.0

2006

7.0

1990

6.7

1968

7.5

2003

5.4

2009

5.0

1973

9.0

2019

6.7

2008

7.2

1992

4.7

2016

0.0

1989

0.0

2019

5.0