In 1980, there were on the average 10 deaths at birth (infant mortality) per 10,000 population. By 1990, there were 8.5 and by 200.7.0 Today there wee 5.5 deaths at birth per 10,00 populations, and it is anticipated that the downward trend will continue. Each of the following,if true, would help to account for this trend EXCEPT ---
