2007

6.6

2012

7.5

1981

6.3

1992

7.5

2019

8.1

2006

6.9

1994

10.0

1996

7.3

1998

7.9

1990

5.6

1990

6.0

1985

6.0

1960

7.6

1984

7.8

1991

7.5

2014

8.2

2015

7.7

1973

7.1

2003

6.0

1990

7.9