2017

7.4

1978

3.8

2003

6.2

1998

6.2

1995

5.1

1972

2.7

2004

5.6

1982

6.6

1969

2.8

2002

7.1

2001

6.7

1997

6.8

2005

6.7

1976

3.5

1972

3.5

2002

6.3

2003

6.8

2000

6.2

2001

6.6

2002

5.3