At Pokerstars 25NL my experienced guess:
X = 40%
y= 60%
Z= 67%

Of course this is image dependent. A LAG will get more calls than a TAG, making the situation less profitable.
I also am not counting Fnord's reads. My guess is vs. two random opponents. If anything my numbers are skewed in my favor because I try these moves at opportune times, not random times.