2016

6.8

1986

6.8

2006

6.1

1967

6.4

1990

6.1

1999

6.3

2008

6.8

1986

6.9

1981

6.6

1973

6.2

2007

7.4

1945

7.6

1989

6.3

1998

5.3

1985

5.3

1994

6.2

1987

6.9

1987

5.5

1971

7.5

2002

6.9