Question: In what year did Beth Holloway's daughter, Natalee Holloway, disappear during to her high school graduation trip to Aruba?

Context articles: Loving Natalee
Beth Holloway
Patrick van der Eem
De zaak Natalee Holloway
Academy of the Canyons
Joran van der Sloot
Aruba: The Tragic Untold Story of Natalee Holloway and Corruption in Paradise
High school diploma
Disappearance of Natalee Holloway
Natalee Holloway (film)

Loving Natalee: A Mother's Testament of Hope and Faith is an autobiography written by Beth Holloway about her missing daughter Natalee Holloway, with portions contributed by Sunny Tillman.
 It was first published in October 2007 by HarperOne, an imprint of HarperCollins, and has also been marketed under its alternate subtitle "The True Story of the Aruba Kidnapping and Its Aftermath".
Elizabeth Ann "Beth" Reynolds Holloway (1961),is an American speech pathologist and motivational speaker who became widely known after her teenage daughter, Natalee, went missing during a high school graduation trip to Aruba in 2005.
Patrick Paul van der Eem (born 1973; Curaçao) is a Dutch Antillean entrepreneur and convicted drug dealer known for his part in the undercover television report about Joran van der Sloot that was produced by Dutch crime reporter Peter R. de Vries.
 The program set a Dutch television viewing record and renewed attention in the ongoing investigation of the 2005 disappearance of American student Natalee Holloway in Aruba.
De zaak Natalee Holloway: mijn eigen verhaal over haar verdwijning op Aruba (English: "The Case of Natalee Holloway: My own story about her disappearance in Aruba") is an autobiographical non-fiction book written by Joran van der Sloot with Zvezdana Vukojevic.
 It was released in 2007 in the Dutch language by Amsterdam-based publisher Sijthoff.
 An English version was not published.
Academy of the Canyons (AOC) is a public middle college high school in Santa Clarita, California, United States.
 The school, which enrolls students from the 9th to the 12th grade, is part of the William S. Hart High School District.
 It is located on the Valencia College of the Canyons campus where the students of AOC are concurrently enrolled.
 Those who are enrolled take high school classes at the Academy of the Canyons section of the University Center, and college courses at the College of the Canyons campus.
 During grades 9-12 students can earn up to 80 college units, enough to receive an associate degree.
 A few students at Academy of the Canyons have also received multiple associate degrees by or before their high school graduation.
 A bonus is that high school students will also receive a College of the Canyons I.D. card and a 25 Score Card.
 Unfortunately, due to CIF regulations, students are not allowed to participate in High School Sports or Intercollegiate Sports.
Joran Andreas Petrus van der Sloot (] ; born 6 August 1987) is a Dutch convicted murderer who killed Stephany Flores Ramírez in Lima, Peru in 2010.
 He is also the prime suspect in the 2005 disappearance of Natalee Holloway in Aruba.
Aruba: The Tragic Untold Story of Natalee Holloway and Corruption in Paradise
A high school diploma is a North American academic school leaving qualification awarded upon high school graduation.
 The high school diploma is typically studied for over the course of four years, from Grade 9 to Grade 12.
 The diploma is typically awarded by the school in accordance with the requirements of the local state or provincial government.
 Requirements for earning the diploma vary by jurisdiction, and there may be different requirements for different streams or levels of high school graduation.
 Typically they include a combination of selected coursework meeting specified criteria for a particular stream and acceptable passing grades earned on the state exit examination.
Natalee Ann Holloway (born October 21, 1986) was an American teenager whose disappearance made international news after she vanished on May 30, 2005, while on a high school graduation trip to Aruba in the Caribbean.
 Holloway lived in Mountain Brook, Alabama, and graduated from Mountain Brook High School on May 24, 2005, shortly before the trip.
 Her disappearance caused a media sensation in the United States, and the case remains unsolved.
Natalee Holloway is a 2009 American television film directed by Mikael Salomon based on Beth Holloway's book about the 2005 disappearance of her daughter Natalee Holloway.
 The film stars Amy Gumenick as Natalee Holloway, Tracy Pollan as Beth Holloway-Twitty and Jacques Strydom as Joran van der Sloot.
 When it aired on the Lifetime Movie Network on April 19, 2009, the film scored the highest television ratings at that time in the network's history.