On the graduate level I believe that a reason for the decline may be that the organizations aren't seen. And it's not like you can just sign up you have to been chosen. So it's a little different. If the chapter isn't visible then people who are interested can't volunteer with them. I dont know but I dont think they go around saying what they are gonna be doing in the community. On the graduate level interests have to really be serious! Absolutely no half steppin'. I think it's a lot harder for you to become a member on the graduate level. You have to be seen by the chapter being active in the community and even if you are really active they dont have to see you. I dunno
