Conceived as a companion project to my Periodic Rookie Group Reports series, By the Numbers is a survey of rookie groups through total numbers. In the tables below, the number of debuts for a given year are aggregated by gender, period, and overall totals.
For notes about sources for these numbers, please refer to the Methodology.
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 18 | 14 | 32 | 
| Girl Groups | 12 | 19 | 31 | 
| Co-Ed Groups | 1 | 0 | 1 | 
| Total Groups | 31 | 33 | 64 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 25 | 21 | 46 | 
| Girl Groups | 33 | 22 | 55 | 
| Co-Ed Groups | 3 | 3 | 6 | 
| Total Groups | 61 | 46 | 107 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 18 | 21 | 39 | 
| Girl Groups | 23 | 27 | 50 | 
| Co-Ed Groups | 1 | 0 | 1 | 
| Total Groups | 42 | 48 | 90 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 14 | 22 | 36 | 
| Girl Groups | 29 | 20 | 49 | 
| Co-Ed Groups | 1 | 0 | 1 | 
| Total Groups | 44 | 42 | 86 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 26 | 22 | 48 | 
| Girl Groups | 22 | 25 | 47 | 
| Co-Ed Groups | 1 | 1 | 2 | 
| Total Groups | 49 | 48 | 97 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 15 | 9 | 24 | 
| Girl Groups | 17 | 29 | 46 | 
| Co-Ed Groups | 0 | 0 | 0 | 
| Total Groups | 32 | 38 | 70 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 27 | 12 | 39 | 
| Girl Groups | 23 | 14 | 37 | 
| Co-Ed Groups | 1 | 1 | 2 | 
| Total Groups | 51 | 27 | 78 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 22 | 14 | 36 | 
| Girl Groups | 17 | 21 | 39 | 
| Co-Ed Groups | 2 | 3 | 5 | 
| Total Groups | 41 | 38 | 79 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 15 | 7 | 22 | 
| Girl Groups | 13 | 21 | 34 | 
| Co-Ed Groups | 2 | 1 | 3 | 
| Total Groups | 31 | 28 | 59 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 15 | 7 | 22 | 
| Girl Groups | 24 | 27 | 51 | 
| Co-Ed Groups | 1 | 2 | 3 | 
| Total Groups | 40 | 36 | 76 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 23 | 21 | 44 | 
| Girl Groups | 25 | 21 | 46 | 
| Co-Ed Groups | 3 | 1 | 4 | 
| Queer Groups | 1 | 0 | 1 | 
| Total Groups | 52 | 43 | 95 | 
| January to June | July to December | Total | |
|---|---|---|---|
| Boy Groups | 19 | 12 | 31 | 
| Girl Groups | 30 | 17 | 47 | 
| Co-Ed Groups | 3 | 2 | 5 | 
| Total Groups | 52 | 31 | 83 |