Explaining Color to a Blind Man..or math to prax

[Praxising]

I hope this thread does two things: helps me understand what the tournament summary means and explores the question of how often the winning player is going to showdown - or should.

First the math part:

I always thought the trny summarries about how many times you saw fourth street was like VPIP. I never really looked at them much until today when I tried to put my trny summaries into my new Poker Tracker.

Then I saw I won more hands than I entered. Wait...wow...I have no idea what any of this means....

OK - here's my sample trny:

234 hands
saw 4th st 40 times 17%
saw 5th st 24 times 10%
saw 6th st 16 times 7%
reached showdown 11 times 5%

Pots won at showdown 10 91%
Pots won w/out showdown 34

34 doesn't have a percent. 34 of what number? How many hands did I actually play? Does "seeing 4th street" mean every time they just folded around to my bring-in is included? Are the 5th street hands independent of the 4th street hands and not the ones left after I folded or won on 4th? What does all this mean?!!

(OK in my own defense I may be dumb as a box o' rocks but I did finish 4th or 5th. Or something.)

I did look at my cash games on PStars where I mostly play and my trnys and I seem to have a pretty steady rate of getting to showdown 5% of the time. Is this normal? It's been an issue before so I'd like to know where I am.