1999

4.5

1959

5.2

1978

6.8

2015

7.8

1991

5.6

1964

6.2

2006

3.0

1998

6.8

2007

6.7

2006

7.0

2003

6.0

1999

7.0

2011

0.0

1967

4.2

2015

5.8

1967

7.7

1993

3.5

1986

5.7

2004

7.2

1980

7.7