context: In 2000, the band played 47 songs. In 2002, they increased the set list to 59 songs. In 2004, 311 played 68 songs. The band played entire albums, rarities and covers. Later that year, a DVD was released of the performance that contained 64 of the 68 songs. 311 Day in 2006 was held at the Mid-South Coliseum in Memphis, Tennessee, where the band played 65 songs. The intended set list was cut short from 69 songs because of a strict midnight curfew. The band recorded the entire show in high-definition television,and a 2-hour edit of the show aired on high-definition television on December 10. In 2008, 311 Day was held in the New Orleans Arena in New Orleans, Louisiana. Over three separate sets, the band played 63 songs to a sold-out crowd of 14,000 fans, who represented all 50 states and 13 countries. In 2010, 311 Day took place at the Mandalay Bay Events Center in Las Vegas Valley. All 60 songs, 32 of which were different from 311 Day in 2008, were broadcast live on the web in a video on demand format described as a "professional multi-camera HD production." In 2012, 311 Day took place at the MGM Grand Garden Arena in Las Vegas and, for the first time, was split into two days. The band performed 79 songs during the two-day concert. On July 3, 2013, the band announced at the Unity Tour show in Chicago that 311 Day 2014 would be returning to New Orleans. 311 Day 2016 took place in New Orleans, at the Smoothie King Center (New Orleans Arena) on 3/11/2016 & 3/12/2016. 311 Day 2018 took place on 3/10 and 3/11 in Las Vegas at the Park Theatre at the Monte Carlo Resort & Casino. 86 songs were played, including a cover of Pink Floyds "Wish You Were Here" with a In Memoriam video tribute to late musicians and 311 fans Renee ONeal, Meredith Hight, and Nick Hexums youngest brother Patrick.
question: How many more songs did 311 play in 2004 than in 2000?
answer: 21