1999

7.1

1978

4.8

1999

6.8

1985

7.7

2003

8.2

1991

7.1

1994

7.4

1986

6.7

2014

3.0

2005

6.2

2016

5.7

2000

5.0

2007

5.6

2005

7.2

2014

0.0

1989

6.0

1964

7.5

2001

7.5

1979

6.0

1968

5.4