What are the majors of skilled immigrants in New Zealand?

According to the policy of Immigration New Zealand 20 1 1 on applying for skilled immigrants, it is divided into three categories:

The first category:

Get a major of Grade 7 or above in New Zealand.

For example: accounting, biochemistry, media, business, management, medicine, education, gardening, nursing and so on.

The second category:

Has obtained New Zealand professional level 4 or above (with national certificate).

For example: automobile electrician, blacksmith, auto repair, electrician, fitter, carpenter, etc.

The third category:

In New Zealand, you have obtained a level 4 course or above (with a national certificate) or at least 3 years relevant working experience without academic qualifications, with an annual salary of at least NZ $45,000.

For example: tennis coach, football player, golf, insurance assessment, western food chef, animal keeper, gardener, business agent, etc.