1995

5.8

2017

6.7

1960

5.3

1991

0.0

1989

7.1

1997

7.5

1984

7.0

2004

0.0

2016

8.2

1982

6.2

2016

7.1

1987

6.2

2007

7.2

0.0

2002

6.7

1988

6.9