1986

7.6

1998

7.1

1990

7.0

2017

0.0

2021

5.5

1980

8.2

2005

6.4

1997

7.5

2001

7.8

1999

7.1

2005

5.6

1992

6.3

2007

5.2

2008

5.4

1987

6.9

1968

6.7

2005

5.7

1990

6.7

0.0

2023

10.0