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Originally Posted by edujude

Hi! Where can I find an updated list of 歴代累計平均ランキング（テレビアニメ) (集計期間1988年頃～2012年12月24日付速報) that extends beyond 50 places? The list at http://www38.atwiki.jp/uri-archive/pages/75.html lists only 50 titles, including OVAs. Is there still an updated list that goes down to TV anime with average sales of at least 10K copies?

There's always the 10k pre-2000 list. Data reporting was pretty different pre-Oricon, which is why I have them separate. Pre-2000 you need to be extra sure the list is including VHS and LD, and it's not always clear.

I've considered going below 10k a few times before, but 10k is a nice round number and I don't know if I want to mix "big hits" with "better than average" 5k series. I could do it as a separate post, though it'd be tricky (by no means impossible) to keep accurate. Maybe in the 2013 thread, but the main reason I'm holding off is that my data only goes back to 2005 + 10k series before then. I wouldn't want to present a 5k+ list until I finish going back to 2000, though I guess I could call it a 2005-Present 5k+ list. For now though, the other sources being provided are better until I have all the data.

Regarding that data, I have a couple more 2005 series to add before that year is done, and its average sales will be in the 2013 thread. But I can already see how things get sketchy even starting back in 2006, but especially earlier. With everything DVD only, thresholds were regularly over 1k, and even successful titles often lacked second weeks. A sales average is only really accurate when every volume ranks a similar number of weeks, or at least two each.

Take the first season of FMP! for example. There are three different averages we could use for it, depending on how you count:
　
Vol - Version - Week 1 - Week 2 - Volume total

*1　DVD　LE　3390　2168　5,558
*2　DVD　LE　3376　2733　6,109
*3　DVD　LE　4461　　　　　　4,461
*4　DVD　LE　3988　　　　　　3,988
*5　DVD　LE　4133　　　　　　4,133
*6　DVD　LE　4113　　　　　　4,113
*7　DVD　LE　3118　　　　　　3,118
*8　DVD　LE　2433　　　　　　
*8　DVD　RE　1099　　　　　　3,532
*9　DVD　LE　2915　　　　　　
*9　DVD　RE　1698　　　　　　4,613
10　DVD　LE　2498　2168　6,057
10　DVD　RE　1391　　　　　　6,057
11　DVD　LE　2146　　　　　　2,146
12　DVD　LE　3173　　　　　　3,173

You can process the above these ways:
4,250 - Average of each volume's total, ignoring all caveats
5,297 - Average of each LE + Average of each RE
7,064 - Average of each wk1 LE + Average of each wk2 LE + Average of each RE

The first is simplest, but also ignores the realities of higher thresholds and is absolutely lower than the real number.
The second adjusts for REs, which apparently sold well for FMP, and risks some assumptions to arrive at what is probably a better number. This is the calculation the DVDBD wiki and I both use. At least 3 REs ranked, with reasonably close numbers, so an average is probably fine.
The third adjusts both for REs and missing second week data. This incorporates the most assumptions, but truth be told I would bet it's the most accurate. Nobody uses it because of the extra layer of assumptions required though.

This sort of thing isn't a big problem nowadays. Unlike 5-10 years ago, anime sells much more of its total in the first week unless it's a late bloomer or understocked. Second weeks are small, and many shows get them, and we have monthly rankings to fill in most of the cases where we don't get them, and expect it to be more than a couple hundred copies. Number of weeks ranked is also more consistent now, with shows that get a second week usually getting it for most volumes, while those that don't, don't for most volumes. Averages are calculated from volume-on-volume data that is more consistent.

That wasn't the case as much in the past, where you could get things like v10 LE up there, which would be truly bizarre to see on any show in 2012. But in 2005? Yeah really not all that uncommon. Shows averaging under 5k could still get 1k+ second weeks. I just took a look at 2011-2012 and the only show averaging less than 10k to get 1k (DVD+BD) or more in the second week for every volume is Hyouka, thuogh prbbaly not for every volume. The only show that really looks like a pre-2007 series is the first season of Sekai-ichi Hatsukoi, averaging under 5k with 1k+ second weeks except the second week unranked last volume.

All that to say, data really is different at different times and I'm almost hesitant about even going back to 2000 in my spreadsheet, though curiosity will take me there eventually.