I recently posted a thread presenting a method for adjusting girl group music show wins by an inflation factor, in order to account for the significant rise in the number of music show wins awarded in recent years.
There was a lot of good discussion in that thread, and it actually inspired me to create a new way to look at the relative strength of various groups, at least when it comes to music show wins.
I'm calling this new methodology "Win Dominance", and calculating it is very simple.
All I do is take the number of wins per year achieved by each girl group, and divide it by the total number of girl group wins in that year, which yields a percentage ("what percentage of total wins did a group capture in a particular year?").
In effect, this will tell us how dominant each group was for a given year, and, importantly, should not be affected by changes in the number of overall music show wins awarded in a year.
My calculations are shown below; the figures are current as of the end of 2020:
Given the table above, it's easy to select the top 10 most dominant yearly performances for girl groups:
56.00% - Wonder Girls in 2007 (Tell Me)
39.56% - Twice in 2017 (Knock Knock, Signal, Likey, Heart Shaker)
39.02% - Wonder Girls in 2008 (So Hot, Nobody)
33.33% - Girls' Generation in 2009 (Gee, Genie)
29.58% - Apink in 2014 (Mr. Chu, Luv)
28.38% - Girls' Generation in 2015 (Party, Lion Heart)
27.45% - 2NE1 in 2009 (Fire, I Don't Care)
26.67% - Twice in 2018 (What Is Love?, Dance the Night Away, Yes or Yes)
And here's the data, but presented in chart form. Official fandom colours were used when possible:
Perhaps the most striking thing we see is how dominant Wonder Girls were early on in the Second Generation. It's often said that they brought girl groups back into fashion, and the data support this claim. However, their position dropped drastically once they were sent off to the United States, and Girls' Generation quickly usurped their position. They would reign supreme until around 2016, when we witnessed the clear rise of Third Generation groups such as GFriend and Twice. However, GFriend quickly saw their dominance drop dramatically after their initial success, and they haven't been able to recover. Twice has fared much better, but has also begun demonstrating some weakness in the past two years, which has not been helped by the rise of Blackpink, Iz*One, and Itzy.