500
"If, rather than to marry Count Paris,
Thou hast the strength of will to slay thyself,
Then is it likely thou wilt undertake
A thing like death to chide away this shame,
That cop'st with death himself to scape from it,"
Act 4, scene 1, lines 71-75
What is; If Juliet is willing to face death itself to avoid the shame of marrying Paris, then she would probably go through the same thing to achieve the same result.