I'd sadly doubt such statistics are available, accurately anyway.
a) How many are made accompanied by a dog do dogs get charged for? of not they travel unrecorded
b) How many are made by an adult in a wheelchair unless pre booked for wheelchair assistance again no statistics will be available
c) How many are made accompanied by a cycle probably partially available, on reservation compulsary journeys
d) How many are made by a baby / toddler in a buggie / pram / pushchair again travel free unticketed so probably no stats available
e) How many are made with significant luggage (of the type / quantity you would need to check in if flying) again travel free unticketed so probably no stats available
f) How many are accompanied with other things I may have forgotten in my list! again travel free unticketed so probably no stats available
Pretty much each of your list is unticketed, so few stats will exist, unless someone has stood at a train boarding, with a clip board