manning the polling precinct) counts the ballots by hand. Once all the ballots are counted, the election returns will now be sent to the city or municipal Board of Canvassers, political parties and other groups. The city or municipal Board of Canvassers canvasses the votes from all polling precincts within their jurisdiction and prepares two documents: a Statement of Votes (SOV) in which all votes from all candidates in all positions per precinct is listed; and a Certificate of Canvass (COC), a document showing the vote totals of all candidates within the Board of Canvassers' jurisdiction. If the city or municipal Board of Canvassers' jurisdiction is an independent city with its own congressional district, they will send their SOV and COC to the national Board of Canvassers (the COMELEC for senate and party-list elections, Congress for presidential and vice presidential elections). If it is otherwise, they will send their SOV and COC to the provincial Board of Canvassers where the votes as stated from the city or municipal COC will be canvassed. The provincial Board of Canvassers sends their SOV and COC to the national Board of Canvassers once canvassing is done. The national Board of Canvassers then canvasses all COCs and declares the winners for national positions. Election automation Since the 2008 Autonomous Region in Muslim Mindanao general election, the voters have to shade the oval that was indicated before the candidate's name, and a voting machine manufactured by Smartmatic automatically counts each ballot as it is fed into it. The results are then printed as the election return and sent electronically to the city or municipal Board of Canvassers. In 2016, for the third time in a row, the Philippines automated their elections using electronic vote counting machines. The deployment of 92,500 of these machines was the largest in the world. Brazil and India, countries which also use technology to process their votes, employ e-voting instead of an automated count. For the 2019 elections, the COMELEC presented its source code for review by accredited U.S. software testing company Pro V&V in an effort to make the automated elections transparent. Comparison of recent and upcoming election years National and local elections are held on the second Monday of May every third year starting 1992. The presidential and vice-presidential elections are held every six years. Election days in which the president and vice president and barangay officials are not elected