star trek - What was Voyager's final crew count?

According to Memory Alpha, the USS Voyager embarked on its mission with 141 crew. Late in the seventh season there were 146.

Between the crew complement being bolstered a few times (Maquis, Equinox, Borg, birth etc), and decreased via death or debarkation, is it possible to know how many crew members arrived on Earth?

Bonus points: does the 146 quoted in Author, Author make sense when calculating the additions and subtractions?

Answer

In-canon, the starting complement was 141 and the final complement was either 150 or 144 (or 143) depending on whether you consider "Timeless" or "Author, Author" to be the last reference on the subject; These figures were confirmed in the following episodes;

Caretaker;

STADI: That's our ship. That's Voyager. Intrepid class. Sustainable cruise velocity of warp factor nine point nine seven five. Fifteen decks. Crew complement of one hundred and forty one. Bio-neural circuitry.

Timeless;

LAFORGE : If you succeed, countless lives will be affected.

CHAKOTAY : We're here to save one hundred and fifty lives. Our crew.

Author, Author

NEELIX: In my hat I hold one hundred and forty six sequentially numbered isolinear chips, one for every member of the crew. Each chip entitles the bearer to three minutes of uninterrupted comm. time with his loved ones back in the Alpha quadrant. Good luck.

For the record, the crew count stated by Neelix in Author, Author seems to include the EMH. Since that episode there was one canon death (Carey) and one departure (Neelix) resulting in a final count of either 144 or 143 depending on whether you imagine the EMH is considered an official crew member by that point.

Per IMDB, there were a considerable number of canon references to crew numbers;

In season 2 episode 1 "The 37s", there are 152 crew. In season 3 episode 2 "Distant Origin" alien sensors pick up 147 lifesigns. In season 5 episode 4 "In the Flesh", the Doctor implies there are just 127 crew. In season 5 episode 13 "Gravity", there are 152 crew. In season 5 episode 15 "Dark Frontier" there are 143 lifesigns. In season 5 episode 22 "Someone to Watch Over Me" there are 146 crew. In season 7 episode 20 "Author, Author" there are still 146 crew members despite there being several deaths since the events of "Someone to Watch Over Me"

As to the second part of your question (does the figure in Author, Author make sense?) as you can see on the excellent Ex Astris Scientia website the crew count for the USS Voyager was notoriously inconsistent, even for a Star Trek series. It would rise despite crew members dying in previous episodes and fall without any justification. In the final two seasons, the number seems to simply be fixed at 146 regardless of the events of the series.

Not only that, but due to the vagaries of TV extra casting, the number of crew members seen (and named) on the show actually exceeds the crew complement numbers mentioned in the various episodes.