An update on Asadora's ratings (since the revival of Asadora's Gegege no Nyobo):
2016 Oct-Mar『Beppin-san』 20,3%
2016 Mar-Sep『Toto Nee-chan』 22,8%
2015 Oct-Mar『Asa ga Kita』 23,5%
2015 Mar-Sep『Mare』 19.4%
2014 Oct-Mar『Massan』 21.1%
2014 Mar-Sep『Hanako to Anne』22.6%
2013 Oct-Mar『Gochisousan』22.4%
2013 Mar-Sep『Amachan』20.6%
2012 Oct-Mar『Jun to Ai』17.1%
2012 Mar-Sep『Umechan Sensei』20.7%
2011 Oct-Mar『Carnation』19.1%
2011 Mar-Sep『Ohisama』18.8%
2010 Oct-Mar『Teppan』17.2%
2010 Mar-Sep『Gegege no Nyobo』18.6%
Currently airing "Hiyokko" is at 19,9% right now, the last 3 weeks received a boost in ratings, so it will reach the 20% soon. The next Asadora, "Warotenka" looks promising. The looks reminds me of Hanako to Anne and the later in the series Asa ga Kita. The official site is up:
http://www.nhk.or.jp/warotenka/