1991

6.3

2024

9.6

2015

5.9

1985

6.1

1967

7.1

2006

6.9

1971

7.0

2002

4.5

2017

5.8

2006

9.8

1973

7.7

1993

5.5

2000

5.2

2018

8.4

2001

5.2

7.1

1978

7.0

1994

6.8

1987

5.5

2009

7.0