What conclusions have you reached about Silas’s true identity, in the graveyard book

 Silas is not just Bod's protector but the protector/peacekeeper of all things supernatural.

b. his ability to use formal language to stress strong feelings

for this case, we must find the number of deaths per day of the year 2015, in automobile accidents, knowing that 32,400 people died.

knowing that the year 2015 had 365 days we have the following division:

where "x" represents the number of deaths per day.

rounding off we have:

approximately, 89 people per day died in 2015

answer:

89 people per day