Does Diana's high school class care?

Diana’s ten year class reunion is approaching…
…and she seems to be one of very few classmates that care.
This afternoon Diana and I ran into one of her fellow organizers of the event at the bank. There, Diana received some sad news.
The group had been expecting an amount of nearly $2500 to be received from those attending the reunion. This amount would have covered the planned expenses of renting the room and catering.
So far, only $540 has been collected.

Where the nature of this exhcange of information was quick, there wasn’t time to ask exactly how many people were represented by that $540. Curiosity led me to figure it out.
At prices of $50 per couple and $30 per single, only two possibilites exist. Either six couples and eight singles; or eighteen singles plan to attend her reunion (these numbers exclude those on the committee, as none of the committee members have paid as of yet). That is a very sad number.
Out of a class of roughly 200, less than 10% plan to attend their reunion.
…I wonder what that number says. Does it say that only 10% live in the area? Or does it say that only 10% give a damn about their former friends and classmates? Or could it be something that Diana said while we were in the car.
With sites like Facebook, who needs a reunion?
Could Facebook have a part in this?
I seriously doubt that the culprit of the low numbers are due to Facebook or other sites giving the ability for people to keep up with one another (the theory being that by having an avenue such as this, there isn’t a need to catch up with everyone every so many years). In looking at the network of friends on Facebook from Diana’s class, there are only thirty people. Of those thirty that list their address, four live outside of the state. (I recognized a couple of the others who didn’t list an address, and know that they live elsewhere. And don’t forget, that a few of those people listed on Facebook are on the committee, so they don’t count.)
So, I guess that the only answer is that there is a mix of people who’ve moved on to other exciting locales, and people who simply do not want to be bothered by the past.
I find all of this very disturbing, and wonder what my ten-year (which will come next year) will be like.
…but, I can’t complain too much. I didn’t go to my five-year, and don’t foresee going to this next one.