1999

9.1

2003

7.0

2010

6.7

1968

6.9

5.1

1973

9.2

1993

6.1

1994

7.4

2008

6.8

1964

7.4

1990

7.9

2018

4.5

2004

7.9

1987

7.4

2021

6.7

2013

6.0

2019

8.0

2000

5.1

2012

6.5

1989

9.3