1995

7.6

1985

8.3

2001

7.8

1989

7.8

1986

7.1

1990

7.5

1996

7.3

1984

7.7

1991

8.1

2003

6.2

2018

4.8

2021

5.4

2009

6.9

2008

7.0

1986

5.2

2010

6.0

1972

6.5

2018

6.7

2025

9.8

1979

6.8