求助 JHU 申请 财产证明问题

求助
申JHU的时候要填International Student Supplement

有一项
*Living costs, books, health insurance, etc. New students also must pay a one-time matriculation fee of $500. Expenses for the 2015-2016 year will be available in early spring, 2015; students should expect the total to be approximately $73,000. If your JHU program offers you financial assistance, that information will be provided directly to the Office of International Services.
 I have (amount) ________________ of non-JHU financial support to cover my costs of study. You must attach a PDF file that documents this support. If you are receiving funds from another organization or individual, including parents, you must include a statement from the organization or individual that affirms that support. Documentation may not be more than 6 months old.  I do not have any non-JHU support for my study

请问那就是提交的时候就要附上财产证明了吗？

我也看到了，我感觉是不用的，应该先写个大约的数字吧。要是人家财产证明大都是在录取之后做的，如果没录取你，还让你存了好多钱感觉这个设定挺反人类的。而且这个pdf下载的地方写了optional，不知道是不是不一定要填写，，，