There are some pressure suits primarily for use inside spacecraft and some for use during EVAs. Currently how many pressure suits are used or will be used in the near future; let's say from 5 year back (2015) to with some level of certainty within the next five years?
I know there may be cases where it's difficult to say for sure if a current design will be used within the next five years, for the purposes of this question be a bit conservative; if something is under active development and working (pressure/vacuum tested (but not necessarily to double-vacuum), people can walk around in it) prototypes have been publicized, then it's probably okay. If it's still in the fashion designer stage, then it probably isn't. Commercial and government space agency suits both would count.
I would suppose there would be Russian, Chinese, European and American suits at least.