Hi gb

Interplanetary material "accreted" in the present day is ~ 30 - 60 kilotons per year. Most of the dust scale material actually comes from just a couple of asteroid families. Computer modelling and observations suggest the asteroid families of Eos, Themis and Koronis are the sources of most interplanetary dust [S.J.Kortenkamp and S.F.Dermott, Icarus Vol.135(no.2),Oct.1998,pg.469-495] and most asteroidal impactors are from Main Belt collisions sending debris our way.

Comets are a bit more sporadic and contribute a bit less - aside from the visible meteor contribution, they supply ~ 25% of the space dust and fewer big impactors too.

Adam