What you made previously "should" not be a concern to them. What you are worth is more important. Tell them what salary you are expecting, and if they ask why so high, be ready to justify that number.
Going forward, learn to get around that question by giving ranges or salary expectations instead of what you currently make. Really, nothing good (from the employees perspective) can come from divulging your previous salary.
I was laid off several years ago from a ".com" bankruptcy and took an intern job paying A LOT lower because it was close to a university and would allow me to finish my degree very quickly.
Once I finished my degree, I had more knowledge/experience than most new Computer Science grads, so I got a lot of interviews. I made the mistake of telling a company what I was making as an intern and they questioned why I was asking for such a large increase? I explained because of my skills and experience, but they insisted that was only worth a few dollars more.
So, I knew this job was not for me. A few weeks later, I got an offer from another company that realized my value, and paid me more than what I was asking the first company.