If you live in the US, you should be receiving 2010 US Census Form shortly. As an advocate for our TAAMN (Taiwanese American Association in Minnesota), I would like to urge you to write down “TAIWANESE” in item #9 on the 2010 US Census form.
These are some interesting statistics provided by the Taiwanese American Heritage Week.
If you click on a specific state, you will also find the population by the Asian ethnic groups. For example, this is the data from the 2000 US Census for the state of Minnesota. http://www.taheritage.org/census/Minnesota.htm
You can find a summary of Taiwanese Americans by state in the US.