First off, Bulgaria has 7.128 million people in it, and only 15,035 cases of Autism:
https://www.google.com/search?q=population+in+bulgaria&oq=population+in+bulg&aqs=chrome.1.69i57j0l5.3083j0j7&sourceid=chrome&ie=UTF-8
and
http://www.rightdiagnosis.com/a/autism/stats-country.htm
So doing the math, Autism in Bulgaria is at 0.0021%, which if the US has the same rate would put the total number of cases in the US at 658,097, but we currently only have 587,310, so we are only a little better than them. Our factor is 0.0019%.
Vaccines do not cause autism. Sorry, they just don't.
https://www.autismspeaks.org/what-autism/learn-more-autism/what-causes-autism
Recently Julie Gerberding, the head of the U.S. Centers for Disease Control and Prevention (CDC), appeared on Dr. Sanjay Gupta's show House Call and explained that vaccines can trigger autism in a vulnerable subset of children. This is the claim that many parents have been making since at least the 1980s, and they have been dismissed and even mocked for making it.
You, sir, are mistaken. And blatantly misinformed. And spreading your ignorance when you need to keep quiet.
You are taking Mrs. Gerberding's words out of context. Children with a specific mitochondrial disorder may develop a wide range of issues from a vaccine. This does include autism, but it is very limited and the benefits still out way the risks. If 10% of the time, vaccines caused autism, we would see 400,000 new cases every year. If it was 5%, it would be 200,000 new cases per year. The US currently has a total of about 550,000 cases.
Just Polio and Measles effected approximately 25% of the population before the vaccines. That would mean, that even just these two illnesses would effect around 1,000,000 kids per year. Which is more risky?
My ignorance comes from actually knowing the facts of the case, and trying to tell someone to keep quite rather than disputing their points, shows how hollow your argument is.