2009

4.8

1990

7.7

2009

6.3

2015

5.1

1952

7.2

2002

6.6

1958

6.9

1951

7.3

1968

6.3

2003

7.5

2010

5.8

1972

7.1

1986

5.8

1995

6.8

1956

7.6

1946

7.8

1999

7.1

2013

6.7

2000

4.9

1984

6.5