Thou art become guilty in thy blood that thou hast shed; and hast defiled thyself in thine idols which thou hast made; and thou hast caused thy days to draw near, and art come even unto thy years: therefore have I made thee a reproach unto the heathen, and a mocking to all countries.
Thou hast caused thy days to draw near - the shorter period-namely, that of the siege.
And art come even unto thy years - the longer period of the captivity. The "days" and "years" express that she is ripe for punishment.