1960

6.1

1955

7.4

1975

8.7

1984

8.6

2016

7.8

2004

6.7

2000

6.1

2007

5.7

1995

6.4

2021

7.9

1968

4.4

1934

6.8

2006

6.5

2009

7.9

2009

8.1

2009

8.3

1969

7.1

2015

6.0

2016

7.0

1961

5.6