2002

7.4

1984

7.2

2005

7.0

1990

6.2

1999

7.6

1998

5.9

2006

7.7

2005

5.6

2016

5.5

1942

6.8

1941

6.3

2016

6.2

2016

4.0

1995

6.2

1947

6.7

1989

6.7

1999

6.8

1976

2.2

1973

4.3

1995

5.0