Minimum pensions were increased by amounts equal to two or three times the inflation rate, and between 1970 and 1972, such pensions increased by a total of 550%. The incomes of 300,000 retirement pensioners were increased by the government from one-third of the minimum salary to the full amount. Labor insurance cover was extended to 200,000 market traders, 130,000 small shop proprietors, 30,000 small industrialists, small owners, transport workers, clergy, professional sportsmen, and artesans. The public health service was improved, with the establishment of a system of clinics in working-class neighborhoods on the peripheries of the major cities, providing a health center for every 40,000 inhabitants. Statistics for construction in general, and house-building in particular, reached some of the highest levels in the history of Chile. Four million square metres were completed in 1971–72, compared to an annual average of million between 1965 and 1970. Workers were able to acquire goods which had previously been beyond their reach, such as heaters, refrigerators, and television sets. As further noted by Ricardo Israel Zipper,