I am wondering if my family is similar to yours... I have 2 sisters and 1 brother. My older sister and I were 5 and 7 years old when my parents joined. My other sister and brother were "born in". But pretty much you can say we were all raised in the "truth"...
My 2 sisters are both DF'd. I am in Fadeland - neither DF nor DA, but viewed by the hundreds in this circuit as such... So only my brother is still in.
So, we have a 75% rejection rate - also note our ages are 32 - 45.
How does this compare with your sibling rejection rate? Could this be a trend as the JW generation that were born in the 60s/70s see their children start to become teenagers/young adults and realize this religion does not make sense?