You can get some very detailed information about this on the US Bureau of Labor Statistics. In particular, check out this information sheet from the BLS
http://www.bls.gov/oco/pdf/ocos021.pdf Some of the information you will find in the document linked above is:
Annual salary rates for human resources workers vary according
to occupation, level of experience, training, location, and firm size.
Median annual wages of compensation and benefits managers
were $86,500 in May 2008. The middle 50 percent earned between $64,930 and $113,480. The lowest 10 percent earned less than $49,350, and the highest 10 percent earned more than $147,050. Median annual wages in the industries employing the largest numbers of compensation and benefits managers were:
Computer systems design and related services...........$97,630
Insurance carriers..........................................................94,340
Management of companies and enterprises..................94,230
General medical and surgical hospitals.........................86,060
Depository credit intermediation..................................84,980
There is also a detailed discussion of the educational background and career paths in your area of interest.
Hope this helps.