1921

6.8

2010

7.7

1984

7.0

2004

5.5

2017

8.2

1994

4.8

1988

6.4

2001

4.9

2014

5.4

1972

7.9

1987

4.1

2003

6.0

1995

6.4

1995

4.6

1981

6.3

2014

6.5

1983

4.5

1991

5.9

1964

7.3

1984

6.5