1979

2.0

1988

7.1

2002

6.8

1983

5.2

2001

7.0

2001

5.1

1970

2.0

1985

5.8

1987

6.9

1975

5.5

2019

6.9

1983

4.4

2006

6.3

1968

7.6

1990

6.6

1976

5.7

2021

5.6

1999

6.5

1986

0.0

2015

5.9