sentences:  They have resided in Arlington since 1969 and have two children.While serving as treasurer, O'Leary has steadily lowered Arlington's tax delinquency rate from a high of over nine percent to a historic low of just over one half of one percent in 2011, thereby increasing the County's revenue by approximately $128,000,000 during the same period.In 1991 he received a gubernatorial appointment to the Dillon Rule Commission.