1983

7.9

1986

5.0

1987

7.7

2020

6.7

2014

7.1

2021

6.6

2021

7.0

2022

6.2

2005

6.7

2006

7.8

1993

7.6

1982

5.7

1996

7.0

2004

8.3

1998

8.2

2002

8.2

2005

7.6

2006

7.6

2002

7.1

2006

6.2