2003

6.1

1990

6.2

1991

6.8

2006

6.9

2014

7.6

2006

4.7

1994

6.5

2023

6.4

1971

7.2

1981

7.1

2007

6.2

2000

6.3

1994

5.7

1993

6.3

2002

5.9

1986

5.8

1998

7.0

1999

6.8

1990

6.4

1998

6.5