Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| School | Location | Enrolment | Founded | Denomination | Day/Boarding | School Colours | Abbreviation | In competition since |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| All Hallows' School | Brisbane | 1300.0 | 1861.0 | Catholic | Day | Light Blue & White | AHS | 1990.0 |
| Brisbane Girls' Grammar School | Spring Hill | 1150.0 | 1875.0 | Non-Denominational | Day | Royal Blue | BGGS | 1991.0 |
| Brisbane State High School | South Brisbane | 2200.0 | 1921.0 | Non-Denominational | Day | Sangria & Navy Blue | BSHS | 1990.0 |
| Lourdes Hill College | Hawthorne | 850.0 | 1916.0 | Catholic | Day & Boarding | Silver, Purple & White | LHC | 2000.0 |
| St Aidan's Anglican Girls' School | Corinda | 800.0 | 1929.0 | Anglican | Day | Navy Blue, White & Brown | STA | 1990.0 |
| St Hilda's School | Southport | 750.0 | 1912.0 | Anglican | Day & Boarding | Red, Yellow & Blue | STH | 1990.0 |
| St Margaret's Anglican Girls' School | Ascot | 900.0 | 1895.0 | Anglican | Day & Boarding | Navy Blue, White & Brown | STM | 1990.0 |
| St Peter's Lutheran College | Indooroopilly | 2000.0 | 1945.0 | Lutheran | Day & Boarding | Maroon & White | SPLC | 1990.0 |
| Stuartholme School | Toowong | 700.0 | 1920.0 | Catholic | Day & Boarding | Red, Gold & Blue | STU | 1991.0 |
Question:
What is the enrollment of STM which has been in competition since 1990?
Answer:
1.0