Question: The king during  the 166th year of the Rattanakosin Kingdom of Thailand served for how many years and days?

full_context: Document 1: 2010 in Thailand: The year 2010 was the 228th year of the Rattanakosin Kingdom of Thailand. It was the 64th year in the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2553 (1 January – 31 March) and 2554 (1 April – 31 December) in the Buddhist Era. The year saw large anti-government protests which led to a violent military crackdown in May.
Document 2: Thawisan Ladawan: Thawisan Ladawan (Thai: ทวีสันต์ ลดาวัลย์ ) (26 January 1923 – 7 April 2006) was husband of Busba Kitiyakara (younger sister of Queen Sirikit), a member of King Bhumibol Adulyadej's Privy Council, and for 26 years, principal private secretary to the King. Thawisan attended Vajiravudh College and graduated from the inaugural class of Thammasat University in 1938. He worked in several capitals, including Paris and Brussels, and earned a Diplome d'Etudes Superieures de Droit International Public from Paris University in 1954. He became Deputy Director-Deneral of the Protocol Department before departing in 1968 to serve as Deputy Principal Private Secretary to Bhumibol. A year later he became Bhumibol's Principal Private Secretary, and was later appointed to the Privy Council. He died at the age of 83 due to chronic liver disease.
Document 3: 2012 in Thailand: The year 2012 was the 230th year of the Rattanakosin Kingdom of Thailand. It was the 66th year in the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2555 (1 January – 31 March) and 2556 (1 April – 31 December) in the Buddhist Era.
Document 4: History of Thailand (1932–1973): The history of Thailand from 1932 to 1973 was dominated by military dictatorships which were in power for much of the period. The main personalities of the period were the dictator Luang Phibunsongkhram (better known as Phibun), who allied the country with Japan during the Second World War, and the civilian politician Pridi Phanomyong, who founded Thammasat University and was briefly prime minister after the war.
Document 5: Crown Prince of Thailand: The Crown Prince of Thailand (or Siam; Thai: สยามมกุฎราชกุมาร ; rtgs: Sayammakutratchakuman ) is a title held by the heir apparent to the Thai throne. First created by King Chulalongkorn (Rama V) in 1886, for his son Prince Maha Vajirunhis, the king's eldest son by a royal wife Queen Savang Vadhana. Prior to this, the Siamese throne did not have a law or formal system regulating the royal succession. In 1688 King Petracha of Ayutthaya created the title of Front Palace, which by the Rattanakosin period had become the main title granted to the heir presumptive to the throne. However few Front Palaces have succeeded to the throne this way, with the exception of King Buddha Loetla Nabhalai (Rama II) in 1809. After the Front Palace crisis in 1875, the title of Front Palace was abolished and replaced with the title of Crown Prince, who became heir apparent to the throne.
Document 6: 1948 in Thailand: The year 1948 was the 166th year of the Rattanakosin Kingdom of Thailand. It was the 2nd year in the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2491 (1 January – 31 March) and 2492 (1 April – 31 December) in the Buddhist Era.
Document 7: Vajiralongkorn: Maha Vajiralongkorn Bodindradebayavarangkun (Thai: มหาวชิราลงกรณ บดินทรเทพยวรางกูร , rtgs: "Mahawachiralongkon Bodinthrathepphayawarangkun" ,  ] ; born 28 July 1952) is the King of Thailand, since 2016. He is the only son of King Bhumibol Adulyadej and Queen Sirikit. In 1972, at the age of 20, he was made crown prince by his father. After his father's death on 13 October 2016, he was expected to succeed to the throne of Thailand but asked for time to mourn before taking the throne. He accepted the throne on the night of 1 December 2016 but will not be crowned formally until after the cremation of his father, expected to be on 26 October 2017. His father Bhumibol's coronation took place four years after his accession. The government retroactively declared his reign to have begun on 13 October 2016, upon his father's death. As the tenth monarch of the Chakri Dynasty, he is also styled as Rama X. At the age of 64, Vajiralongkorn is the oldest Thai monarch to ascend to the throne.
Document 8: 2011 in Thailand: The year 2011 was the 229th year of the Rattanakosin Kingdom of Thailand. It was the 65th year in the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2554 (1 January – 31 March) and 2555 (1 April – 31 December) in the Buddhist Era. The year saw the election of Yingluck Shinawatra as prime minister, as well as the worst flooding in the country's history.
Document 9: Bhumibol Adulyadej: Bhumibol Adulyadej (Thai: ภูมิพลอดุลยเดช ; rtgs: "Phumiphon Adunyadet" ;  ] ; see full title below; 5 December 1927 – 13 October 2016), conferred with the title King Bhumibol the Great in 1987, was the ninth monarch of Thailand from the Chakri dynasty as Rama IX. Reigning since 9 June 1946 he was, at the time of his death, the world's longest-serving head of state, the longest-reigning monarch in Thai history and the longest-serving monarch having reigned only as an adult, serving for 70 years, 126 days. During his reign, he was served by a total of 30 prime ministers beginning with Pridi Banomyong and ending with Prayut Chan-o-cha.
Document 10: 1982 in Thailand: The year 1982 was the 200th year of the Rattanakosin Kingdom of Thailand. It was the 36th year in the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2525 (1 January – 31 March) and 2526 (1 April – 31 December) in the Buddhist Era.
Document 11: 1997 in Thailand: The year 1997 was the 215th year of the Rattanakosin Kingdom of Thailand. It was the 51st year of the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2540 (1 January – 31 March) and 2541 (1 April – 31 December) in the Buddhist Era. It is most significantly marked by the 1997 Asian financial crisis, which began when the Bank of Thailand floated the baht on 2 July, as well as the promulgation of the 1997 Constitution of Thailand.
Document 12: 1960 in Thailand: The year 1960 was the 178th year of the Rattanakosin Kingdom of Thailand. It was the 14th year in the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2503 (1 January – 31 March) and 2504 (1 April – 31 December) in the Buddhist Era.
Document 13: 1992 in Thailand: The year 1992 was the 210th year of the Rattanakosin Kingdom of Thailand. It was the 46th year of the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2535 (1 January – 31 March) and 2536 (1 April – 31 December) in the Buddhist Era. It is most significantly the year which saw the events of Black May, a pivotal moment in Thailand's political history.
Document 14: 2006 in Thailand: The year 2006 was the 224th year of the Rattanakosin Kingdom of Thailand. It was the 60th year of the reign of King Bhumibol Adulyadej (Rama IX), and is reckoned as year 2549 (1 January – 31 March) and 2550 (1 April – 31 December) in the Buddhist Era. Major events include the celebration of King Bhumibol's Diamond Jubilee, and the intensification of the 2005–06 Thai political crisis, which culminated in a coup d'état on 19 September.
Document 15: Mahidol University: Mahidol University (MU), an autonomous research institution in Thailand, had its origin in the establishment of Siriraj Hospital in 1888. Becoming the University of Medical Science in 1943, it has been recognized as the country's fourth public university. The university was later renamed in 1969 by King Bhumibol Adulyadej after his father, Prince Mahidol of Songkhla, who is widely regarded as "Father of Modern Medicine and Public Health of Thailand." The university originally focused on health sciences but also expanded to other fields in recent decades. It hosted Thailand's first medical school, the Siriraj Medical School. Today, MU offers a range of graduate (mostly international) and undergraduate programs from natural sciences to liberal arts with remote campuses in Kanchanaburi, Nakhon Sawan, and Amnat Charoen provinces. In terms of fiscal budget and portion of budget spent on research programs, MU receives the highest budget of any public university in Thailand: about $147 million each year, most of which is granted for graduate research programs. Mahidol University was ranked Thailand's #1 university in 2011 by QS Asian University Rankings.
ground_truth: 70 years, 126 days