2006

8.2

1972

6.5

2000

5.8

2019

5.7

1981

5.4

2019

5.9

1991

6.7

1971

6.2

2014

4.4

1991

6.1

1984

6.7

1996

6.4

1997

7.5

2008

7.6

1989

5.8

1974

5.3

1999

7.3

1990

6.0

1980

6.8

1999

6.5