1984

5.4

2008

7.3

2005

7.0

2003

6.3

1998

7.5

2003

5.9

2003

6.7

1990

5.1

1994

5.3

1989

6.6

1998

5.7

1996

6.0

1991

5.7

1994

6.4

2014

4.9

2001

4.7

2002

5.9

2024

5.6

1967

7.7

1976

7.2