2017

6.9

2000

4.4

1999

6.8

1998

5.1

1986

6.2

1997

7.3

1970

6.6

1962

7.9

1999

6.5

1988

5.4

1989

4.9

1993

4.5

1964

7.2

1954

5.0

1993

6.0

2004

5.3

1999

6.2

2002

5.6

1967

7.6

1988

6.3