1938

1.0

1988

7.2

1995

8.2

2004

6.5

1965

6.7

1964

6.8

1967

6.7

2003

7.0

1995

3.2

1960

6.4

1987

7.1

1990

7.5

2002

5.4

2001

5.9

1999

6.8

1978

7.2

2000

5.7

2015

0.0

2018

0.0

1997

6.6