2021

6.6

1985

6.7

2004

7.9

2005

5.3

1981

7.0

2008

6.8

2003

5.0

1978

6.1

2017

7.4

1983

5.6

2007

6.3

2008

7.1

2004

5.4

1989

6.5

1990

6.2

2002

6.5

2002

4.7

2002

6.1

2006

6.4

1974

6.9