SJSinNYC:
You asked why I discuss 100 boys for 150 girls. In terms of actual numbers here is the sitaution.
Every year aprox. 10% more girls enter shidduch island than boys. Lets take the last five yrs as a small sampling. Per year (based on class sizes) apox. 2,000 boys enter the shidduch parsha which multiplied by 5 yrs is 10,000 boys. During the same time period there were aprox. 2,200 girls per year entering the parsah for a total of 3,000 girls.
If over the last 5 yrs 85% of these boys have gotten married (to girls obviouly). And, even if we assume that every last one of the boys married a girl from that same five year period, the result would be 1,500 left and 2,500 girls left. If 90% percent of the boys have gotten married than the result would be 1,000 boys left and 2,000 girls.
SO while you are right that there are “only” 10% more girls per year than boys. That equals aprox 200 girls per year don’t have a shot, not at 190 and not at 35. When we multiply that by what has been happening for the last 10 years we have a terrible situation.
Baruch Hashem progress has been made towards encouraging more close in age shidduchim as a result of the recent ongoing discussions and public speeches on the issue.