(Reuters) - Marathon Oil Corp on Thursday became the latest U.S. oil producer to raise its quarterly dividend as COVID-19 vaccine rollouts and increased travel demand lift crude prices. The company raised its dividend by 33% to 4 cents per share and said it redeemed $500 million in debt, addressing its next significant maturity. Oil major Chevron Corp had raised its quarterly payout by 5 cents to $1.34 per share on Wednesday, while Continental Resources Inc reinstated its dividend.