The rate of inflation fell from 36.1% in 1970 to 22.1% in 1971, while average real wages rose by 22.3% during 1971. Minimum real wages for blue-collar workers were increased by 56% during the first quarter of 1971, while in the same period real minimum wages for white-collar workers were increased by 23%, a development that decreased the differential ratio between blue- and white-collar workers’ minimum wage from 49% (1970) to 35% (1971). Central government expenditures went up by 36% in real terms, raising the share of fiscal spending in GDP from 21% (1970) to 27% (1971), and as part of this expansion, the public sector engaged in a huge housing program, starting to build 76,000 houses in 1971, compared to 24,000 for 1970. During a 1971 emergency program, over 89,000 houses were built, and during Allende's three years as president an average of 52,000 houses were constructed annually. Although the acceleration of inflation in 1972 and 1973 eroded part of the initial increase in wages, they still rose (on average) in real terms during the 1971–73 period.