This could be the most important question. When looking at a career in a new industry, you are likely to have more opportunities if there is sustainable long-term growth. A company like this will have more resources to invest in new products or services. There will also be more opportunities for advancement and compensation.
However, there is no definitive standard of industry growth rates. Instead, you'll generally see the following diverse sources:
Trade Associations: Each industry will have one, and they will have a website that provides lots of helpful information, usually for free. Yahoo has a comprehensive list of trade associations here: http://dir.yahoo.com/business_and_economy/organizations/trade_associations/.
Private Data Providers: Their research is often extensive, but the price tag can be high. It is not uncommon for a research report to cost thousands of dollars. Thus, for someone who is researching an industry for career purposes, this is really overkill...