Our portfolio's annual loss rate went from 3% to about 4.1%. Last year prime customers were 80% of balances with a 2% loss rate and subprime were 20% with 7%; this year prime is 65% at 2.2% and subprime is 35% at 7.5%. Leadership asks whether risk got worse or our customer mix changed. What do you tell them?

我们组合的年化损失率从3%升到了约4.1%。去年优质客户占余额80%、损失率2%，次级客户占20%、损失率7%；今年优质客户占65%、损失率2.2%，次级客户占35%、损失率7.5%。领导问：是风险变差了，还是客群变了？你怎么回答？