1992

6.9

1985

7.9

2013

7.7

2001

7.8

1998

7.1

1993

6.6

2006

8.2

2006

8.6

1985

7.4

2018

6.4

2020

8.4

2005

8.3

2004

8.1

1979

6.8

2004

8.3

1986

8.3

2001

8.6

2020

8.1

5.8

2024

9.8