2018

6.6

1975

6.3

1986

6.8

1995

6.0

1957

6.9

1981

6.8

1998

5.0

1997

5.6

1973

7.3

1996

5.7

1994

6.1

2019

7.3

2006

6.4

1951

4.0

1972

6.2

2000

3.1

1999

6.0

1931

6.1

1959

6.2

2015

6.9