1962

6.9

1964

7.0

2016

7.0

2014

4.0

1994

5.7

2015

0.0

2011

0.0

1991

7.7

1974

5.5

2000

6.5

2004

6.1

1996

5.8

2017

5.9

1989

8.7

1993

9.0

2014

6.1

1995

5.8

2006

7.1

1999

5.6

1978

6.2