1993

7.4

1987

7.6

1990

8.5

2014

6.8

2005

7.5

2005

7.1

2000

6.5

2001

6.9

1980

8.0

2003

7.2

1986

7.0

2014

5.6

1951

4.0

2023

6.0

1989

7.5

2006

6.5

2006

5.4

2018

6.8

1982

7.6

0.0