1993

5.3

1981

6.6

2000

7.6

1989

6.1

1993

7.1

1994

7.8

1977

0.0

1981

6.0

2011

7.3

2001

1.0

1979

6.7

2012

7.7

2005

7.0

2009

8.0

2009

5.8

2024

6.0

1999

7.7

1998

6.4

1991

6.4