What is the enrollment for the institution that joined in 1987? 
CREATE TABLE table_2562113_1 (enrollment INTEGER, joined VARCHAR)
SELECT MIN(enrollment) FROM table_2562113_1 WHERE joined = 1987
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2562113_1 (enrollment INTEGER, joined VARCHAR) Question: What is the enrollment for the institution that joined in 1987?  [/INST] SELECT MIN(enrollment) FROM table_2562113_1 WHERE joined = 1987 </s>