2007

7.1

1988

6.2

1980

4.3

1986

6.6

1989

5.7

1993

7.5

2003

6.2

1980

5.9

2001

6.1

1994

5.7

1995

5.8

1993

6.4

1998

6.5

2009

6.7

2019

6.6

1973

7.2

2004

5.4

2023

6.6

2005

5.2

1982

5.3