Here are the yearly light novel sales rankings for fiscal 2012. (Nov 21 2011 - Nov 18 2012)

Series by series
*1, 2,764,454 Sword Art Online
*2, 2,067,369 Biblia Koshodou no Jiken Techou
*3, 1,033,906 Accel World
*4, *,767,236 Kotenbu Series
*5, *,696,322 Mahouka Koukou no Rettousei
*6, *,686,467 Toaru Majutsu no Index: New Testament
*7, *,674,520 Kuroko no Basket -Replace-
*8, *,654,224 Highschool DxD
*9, *,620,972 Boku wa Tomodachi ga Sukunai
10, *,544,507 Ore no Imouto ga Konnani Kawaii Wake ga Nai
11, *,450,794 Oda Nobuna no Yabou
12, *,447,053 Papa no Iukoto wo Kikinasai!
13, *,425,343 Hidan no Aria
14, *,411,380 Kokoro Connect
15, *,409,949 Kyoukaisenjou no Horizon
16, *,404,065 Kagerou Days
17, *,389,516 Another
18, *,372,821 Ookami Kodomo no Ame to Yuki
19, *,369,703 Haiyore! Nyaruko-san
20, *,349,496 Baka to Test to Shoukanjuu
21, *,300,996 Date A Live
22, *,278,103 Sakurasou no Pet na Kanojo
23, *,277,048 Campione!
24, *,265,512 Onii-chan Dakedo Ai Sae Areba Kankeinai yo ne

Volume by volume
*1, 846,883 Biblia Koshodou no Jiken Techou vol.1
*2, 633,127 Biblia Koshodou no Jiken Techou vol.2
*3, 587,359 Biblia Koshodou no Jiken Techou vol.3
*4, 372,821 Ookami Kodomo no Ame to Yuki
*5, 368,089 Sword Art Online vol.1
*6, 317,124 Sword Art Online vol.2
*7, 304,731 Sword Art Online vol.9
*8, 299,319 Sword Art Online vol.3
*9, 286,781 Sword Art Online vol.10
10, 286,031 Sword Art Online vol.4

11, 265,953 Monogatari Series: Second Season Koimonogatari
12, 257,905 Kuroko no Basket -Replace- vol.2
13, 256,812 Toaru Majutsu no Index: New Testament vol.3
14, 256,003 Kotenbu Series vol.1 Hyouka
15, 249,531 Sword Art Online vol.5
16, 248,944 Sword Art Online Progressive vol.1
17, 246,765 Bokura ga Ita
18, 238,096 Boku wa Tomodachi ga Sukunai vol.8
19, 234,235 Sword Art Online vol.6
20, 225,343 Kagerou Days vol.1

21, 224,504 Kuroko no Basket -Replace- vol.3
22, 221,681 Ore no Imouto ga Konnani Kawaii Wake ga Nai vol.10
23, 213,382 Toaru Majutsu no Index: New Testament vol.4
24, 211,803 Sword Art Online vol.7
25, 208,078 Monogatari Series: Second Season Tsukimonogatari
26, 207,208 Another vol.1
27, 207,060 Toshokan Sensou vol.1 Small Size Edition
28, 206,810 Sword Art Online vol.8
29, 203,672 Baka to Test to Shoukanjuu vol.10
30, 196,364 Ore no Imouto ga Konnani Kawaii Wake ga Nai vol.11

31, 192,111 Kuroko no Basket -Replace- vol.1
32, 187,129 Kotenbu Series vol.2
33, 182,308 Another vol.2
34, 178,722 Kagerou Days vol.2
35, 173,589 Toaru Majutsu no Index: New Testament vol.5
36, 169,291 Baka to Test to Shoukanjuu vol.10.5
37, 165,492 Kotenbu Series vol.3
38, 163,632 Kotenbu Series vol.5
39, 158,612 Kotenbu Series vol.4
40, 133,564 Durarara!! vol.11

41, 129,807 Mahouka Koukou no Rettousei vol.4
42, 128,955 Accel World vol.11
43, 126,704 Mahouka Koukou no Rettousei vol.5
44, 123,542 Accel World vol.10
45, 115,154 Ookami Kodomo no Ame to Yuki Kids Edition
46, *93,319 Bleach: Spirits Are Forever With You vol.1
47, *74,044 Gintama Kaettekita 3nen Zgumi Ginpachi-sensei Phoenix: Funky Monkey Teachers
48, *65,609 Shousetsu Ban Medaka Box vol.1
49, *56,093 Kuro Majo-san ga Tooru!! vol.14
50, *55,505 Bleach: The Death Save The Strawberry

Source: Oricon Youtaiju