这个非限制性定语从句修饰的谁？

Question

New cases of the incurable lung disease outnumber deaths caused by workplace accidents, which number about 6,000 annually
修饰“New cases of the incurable lung disease ”还是“outnumber deaths caused by workplace accidents”？为什么？

Answer 1

which number about 6,000 annually修饰前面的New cases of the incurable lung disease ，这句话的主句强调the incurable lung disease 的数量超过了车间事故所带来的死亡的数量，后面的非限定性定语从句修饰强调部分。所以，是修饰 New cases of the incurable lung disease这个.

Answer 2

which number about 6,000 annually修饰前面的New cases of the incurable lung disease ，这句话的主句强调the incurable lung disease 的数量超过了车间事故所带来的死亡，后面的非限定性定语从句修饰强调部分。

Answer 3

修饰的是deaths caused by workplace accidents（工伤事故死亡病例）；根据句子意思，
句子主谓宾成分划分：主语 New cases of the incurable lung disease （不可治愈的肺部疾病病例） 谓语 outnumeber （远远超过）
宾语：deaths （死亡事件）caused by workplace accidents来做定语修饰 deaths，which引导非限制性定语从句修饰 “deaths caused by workplace accidents”