2012

7.2

2013

6.6

1985

5.1

1958

5.5

2003

5.0

2002

7.4

1989

5.0

2000

5.1

1980

6.6

1978

9.0

1984

6.7

7.8

2006

6.8

1986

6.2

2018

4.7

2011

6.1

1993

4.8

1976

6.2

1964

6.9

2001

4.8