Lougheed spent most of his tenure as premier in a bitter fight with the federal government over control of Alberta's resources. His first term also saw the start of a decade-long development boom, and he later established the Alberta Heritage Savings Trust Fund, which used oil revenues to invest for the long term in such areas as health care and research. He won an even stronger mandate in 1975, reducing the opposition to only six MLAs in total (four Socreds, one New Democrat and one independent) on a record 62.7 percent of the popular vote, more than Manning had drawn during the height of Social Credit's power in the 1950s. He would lead the party to two more landslide victories in 1979 and 1982. His last victory netted the PCs a staggering 75 seats out of 79: in terms of percentage of seats won, the second-largest majority government in the province's history. As a result, he governed with very large majorities for virtually his entire tenure and was in a position to enact practically any program he wanted. Indeed, the six MLAs he faced in 1975 would be the most opposition he would face during his last decade in office.