| Year |
Event |
Status |
Participants |
NOCs |
| 1964 |
400 metres Individual Medley, Women |
Olympic |
22 |
12 |
| 1968 |
400 metres Individual Medley, Women |
Olympic |
28 |
19 |
| 1972 |
400 metres Individual Medley, Women |
Olympic |
38 |
24 |
| 1976 |
400 metres Individual Medley, Women |
Olympic |
20 |
9 |
| 1980 |
400 metres Individual Medley, Women |
Olympic |
16 |
11 |
| 1984 |
400 metres Individual Medley, Women |
Olympic |
18 |
13 |
| 1988 |
400 metres Individual Medley, Women |
Olympic |
30 |
22 |
| 1992 |
400 metres Individual Medley, Women |
Olympic |
32 |
21 |
| 1996 |
400 metres Individual Medley, Women |
Olympic |
31 |
24 |
| 2000 |
400 metres Individual Medley, Women |
Olympic |
28 |
24 |
| 2004 |
400 metres Individual Medley, Women |
Olympic |
25 |
21 |
| 2008 |
400 metres Individual Medley, Women |
Olympic |
37 |
27 |
| 2012 |
400 metres Individual Medley, Women |
Olympic |
35 |
28 |
| 2016 |
400 metres Individual Medley, Women |
Olympic |
33 |
23 |
| 2020 |
400 metres Individual Medley, Women |
Olympic |
17 |
13 |
| 2024 |
400 metres Individual Medley, Women |
Olympic |
16 |
11 |