SCHEMA:
CREATE TABLE table_26368963_1 (year VARCHAR, under_15 VARCHAR, under_19 VARCHAR)
USER:
How many years are there where the the under-15 is Arturo Salazar Martinez and the under-19 is Moises Galvez?

QUERY:
SELECT COUNT(year) FROM table_26368963_1 WHERE under_15 = "Arturo Salazar Martinez" AND under_19 = "Moises Galvez"