PPP is the government from 1992 -- 23 continuous years.
On May 11, 2015, PPP/C will again form the government after the elections.
Progressive Conservative of Alberta is in government from 1971 -- 44 continuous years.
On May 05, 2015 the Progressive Conservative of Alberta, most likely, will win another term in government.
Perhaps, PPP/C will be in government for a very long time.