Can any one suggest the service schedule

tjiang001

Hi, everyone. I have a 2013 Sienna. We only use this van on weekends. The annual mileage is about 2000 miles. I got the complimentary service from dealer and have the car serviced every half year during last two years. Now the free service is over. Since I do not use the car very often and annual mileage is very low, I am wondering should I still go to service every half year? The schedule in the service booklet looks like every half year or every 3000 miles. If I follow mileage, I think once every year is more than enough for me. Any suggestions?