2001

7.7

1988

6.8

2007

7.1

1987

5.6

1996

8.0

1992

0.0

1973

0.0

1984

6.1

1990

4.0

1986

3.7

1990

7.4

2001

7.6

1964

6.5

2010

6.2

1990

4.4

1978

2.0

1989

6.7

1998

7.4

1980

7.0

2013

7.9

1985

7.1

2018

6.1

1984

6.5

1980

6.7