What amount of the university students and adults ehre the the senior high school is 26mm?
create table table_13555999_1 (university_students_and_adults__18yrs varchar, _ varchar, senior_high_school__15_18_yrs_ varchar, PRIMARY KEY (university_students_and_adults__18yrs))
select university_students_and_adults__18yrs + _ from table_13555999_1 where senior_high_school__15_18_yrs_ = "26mm"