Here in Australia, ballots are (initially) counted at the place they were cast. Every ballot issued has a corresponding (but unlinkable) person on the roll (electors are crossed off the roll prior to a ballot being issued). The count of names crossed corresponds to the number of ballots issued which will correspond to the number of ballots counted at the end of the day. Virtually impossible to "insert" a ballot as then your final count would exceed ballots issued.
As the count is completed at the polling place, of which there are multiple per electorate, the total number of votes is substantially lower than 43,000 even, and so the % accuracy is much higher. No publicised figure (that I know of) for how many "missing" ballots there can be before questions are raised, but I suspect its in the single digit range. Ballots are generally counted a couple of times but, even more if there's any ballots missing.
As the count is completed at the polling place, of which there are multiple per electorate, the total number of votes is substantially lower than 43,000 even, and so the % accuracy is much higher. No publicised figure (that I know of) for how many "missing" ballots there can be before questions are raised, but I suspect its in the single digit range. Ballots are generally counted a couple of times but, even more if there's any ballots missing.