Imo that's not many dust spots, hardly noticeable (maybe because of my eyesight) and could be easily removed in pp.
I've had my D7000 almost two years and just recently have noticed spots about the same as shown here. I'm not concerned at this time as some are inevitable and I doubt if you'll ever have a body to be completely dust free all of the time. Once they become more than a few I'll have it cleaned. Dust is common.
Nobody should seek his own good, but the good of others. <><