12% and 5.55% are the amounts the BLS expects the field (number of people employed) to grow in the period 2012-2022. Even for the recognized very hot field of “Computer and Information Analysts” they predict only 26% growth (http://www.bls.gov/emp/ep_table_102.htm lists their predictions for all occupations.) They do predict nearly 50% growth for these: interpreters/translators (46%), home health aides (48%), personal care aides (49%), occupational therapy assistants (43%), diagnostic medical sonographers (46%), industrial-organizational psychologists (53%), insulation workers, mechanical (47%), helpers–brickmasons, blockmasons, stonemasons, and tile and marble setters (43%). Only two of these are huge fields; you can probably guess which ones they are.
(I include strange things in the interests of being thorough and providing complete information - it doesn’t mean I’m taking the position of advocating them for you.)