Chart detailing single-family MBS issuance by agencies. Columns include issuance by Ginnie Mae, Fannie Mae and Freddie Mac; total issuance for purchase loans, refinance loans, modified loans, seasoned loans, and ARMs; and issuance for purchase and refinance. Also includes cash pool volume and Freddie share of GSE total. Annual entries beginning 2013, quarterly beginning 1Q15, and monthly beginning January 2016.