How many inspections were sanitarian Joshua Rosa responsible for in 2010?
in 2010 refers to inspection_date like '2010%'
SELECT COUNT(T2.inspection_id) FROM employee AS T1 INNER JOIN inspection AS T2 ON T1.employee_id = T2.employee_id WHERE strftime('%Y', T2.inspection_date) = '2010' AND T1.first_name = 'Joshua' AND T1.last_name = 'Rosa'