Shower registery

When did y'all notice things being purchased off your registery? (Like how close to your actual shower date?) 
My shower is on 6/25 and only one person has bought something from my registry. Other people have bought stuff, but it's my family who have already mailed me the gifts. I'm just curious if most people purchase stuff like the weekend before..... Or if I'm going to end up with nothing from my registry and just a bunch of random clothes. lol
I'm appreciative either way, just preparing for what I'll need to buy myself.