1971

6.7

2016

6.2

1999

6.1

1934

5.0

1954

5.5

1971

5.1

1978

5.8

1982

7.2

1972

6.5

1977

6.7

1966

5.4

1973

7.2

1969

7.1

1976

7.0

1994

7.3

1977

7.7

1953

6.6

2016

6.8

2015

7.2

1978

6.8