Answer the question at the end by quoting:

Indigenous peoples of Mexico (Spanish: pueblos indigenas de Mexico), Native Mexicans (Spanish: nativos mexicanos), or Mexican Native Americans (Spanish: nativo america mexicanos), are those who are part of communities that trace their roots back to populations and communities that existed in what is now Mexico prior to the arrival of Europeans. According to the National Commission for the Development of Indigenous Peoples (Comision Nacional para el Desarrollo de los Pueblos Indigenas, or CDI in Spanish) and the INEGI (official census institute), in 2015, 25,694,928 people in Mexico self-identify as being indigenous of many different ethnic groups, which constitute 21.5% of Mexico's population.
According to the National Commission for the Development of the Indigenous Peoples (CDI), there were 25,694,928 indigenous people reported in Mexico in 2015, which constitutes 21.5% of the population of Mexico. This is a significant increase from the 2010 census, in which indigenous Mexicans accounted for 14.9% of the population, and numbered 15,700,000 Most indigenous communities have a degree of financial, political autonomy under the legislation of "usos y costumbres", which allows them to regulate internal issues under customary law. The indigenous population of Mexico has in recent decades increased both in absolute numbers as-well as a percentage of the population. This is largely due to increased self-identification as indigenous, as-well as indigenous women having higher birth rates as compared to the Mexican average. Indigenous peoples are more likely to live in more rural areas, than the Mexican average, but many do reside in urban or suburban areas, particularly, in the central states of Mexico, Puebla, Tlaxcala, the Federal District and the Yucatan Peninsula. According to the CDI, the states with the greatest percentage of indigenous population are: Yucatan, with 65.40%, Quintana Roo with 44.44% and Campeche with 44.54% of the population being indigenous, most of them Maya; Oaxaca with 65.73% of the population, the most numerous groups being the Mixtec and Zapotec peoples; Chiapas has 36.15%, the majority being Tzeltal and Tzotzil Maya; Hidalgo with 36.21%, the majority being Otomi; Puebla with 35.28%, and Guerrero with 33.92%, mostly Nahua people and the states of San Luis Potosi and Veracruz both home to a population of 19% indigenous people, mostly from the Totonac, Nahua and Teenek (Huastec) groups.

Is the growth due in part to people living longer?

This is largely due to increased self-identification as indigenous, as-well as indigenous women having higher birth rates

Answer the question at the end by quoting:

Angle was born in the Pittsburgh suburb of Mt. Lebanon Township, Pennsylvania, the son of Jackie and David Angle. He attended Clarion University of Pennsylvania, graduating with a degree in education in 1993. Angle has four older brothers (one of whom, Eric, is also a wrestler) and a sister, Le'Anne, who died in 2003. His father, a crane operator, was killed in a construction accident when Angle was 16, and Angle dedicated both his career and his autobiography to his father.
Throughout mid-2000, after aligning himself with Edge & Christian, "Team ECK" (Edge, Christian, and Kurt) feuded with Too Cool and Rikishi, with Angle defeating Rikishi in the finals of the King of the Ring tournament. He went on to feud with Triple H after a love triangle between them and Triple H's wife, Stephanie McMahon, developed. As a change to the intended storyline of Stephanie turning on her husband and going with Angle, he lost to Triple H at Unforgiven. Before the match started, however, he bumped into a returning Stone Cold Steve Austin, who was looking for the perpetrator who ran him over at the previous year's Survivor Series. Angle offered him his friendship and one of his gold medals, but Austin was not pleased by telling him that he would keep it in a nice safe place, to which Austin referred to "right up his ass" before attacking Angle and throwing his medal to the floor. Following his feud with Triple H, Angle received another push and began pursuing the WWF Championship, defeating The Rock at No Mercy, after botched interference on The Rock's behalf from Rikishi. With his victory over The Rock, Angle became the first wrestler to have won both an Olympic Gold medal and the world championship. Angle retained the WWF Championship for the rest of the year in matches with The Undertaker at Survivor Series and in a six-man Hell in a Cell match at Armageddon. After beating Triple H at the Royal Rumble, Angle eventually lost the title to The Rock at No Way Out. Angle then feuded with Chris Benoit whom he defeated at WrestleMania X-Seven, but lost to him at Backlash in an Ultimate Submission match; Benoit defeated Angle four falls to three in sudden-death overtime. Continuing the feud, Angle again defeated Benoit in a two out of three falls match at Judgment Day. Benoit pinned Angle after an Angle Slam in a "Pinfalls Only" fall, and then Angle made Benoit submit with the ankle lock in the "Submissions Only" fall. Angle won the third fall, a ladder match, with the help of Edge and Christian.

What happen in 2001
Angle retained the WWF Championship for the rest of the year in matches with The Undertaker at Survivor Series