B2B Sales Training Data By Industry

I am seeking market research to answer the following questions for me:

In the B2B (Business to Business) arena in the United Sates, which niche industry shows the following:
1) From most to least, which industry is known to spend the most on training their sales team to use the phone for outbound sales?
2) From worst to best, which industry is known for employing the worst sales reps?
3) From Worst to best, which industry is know for the slowest sales growth in the past 5 years?