2015

6.4

2021

6.2

2006

7.0

2009

7.8

1967

7.7

2007

7.6

2013

7.9

1987

6.3

2021

7.5

1973

7.7

2000

7.2

2013

6.8

2002

7.2

1992

7.3

1986

6.6

1955

7.2

1959

5.5

1968

6.8

1990

7.4

1997

6.4