the light that is transmitted into the air travels a distance, t, before it is reflected at the flat surface below. the average household size was 2.38 and the average family size was 2.97.

in the city, the population was spread out, with 25.0% under the age of 18, 8.4% from 18 to 24, 25.2% from 25 to 44, 21.7% from 45 to 64, and 19.7% who were 65 years of age or older. it's just the way it went down. however, the practice is not considered a reliable method compared to most modern types of birth control. 