Question: Princess Aisha bint Hussein is the sister of the King who has ruled since what year?

full_context: Document 1: Princess Sara bint Faisal: Princess Sara bint Faisal of Jordan (born 27 March 1997) is the daughter Prince Faisal bin Hussein and Princess Alia, and a niece of King Abdullah II of Jordan. She is the younger sister of Princess Ayah and Prince Omar, and is also twin to Princess Aisha. Princess Sara currently attends Amman Baccalaureate School and is a senior.
Document 2: Princess Alia bint Hussein: Princess Alia bint Hussein (born 13 February 1956) is the eldest child of King Hussein of Jordan from his first wife, Sharifa Dina bint Abdul-Hamid.
Document 3: Hussa bint Ahmed Al Sudairi: Hussa bint Ahmed Al Sudairi (1900–1969) was one of King Abdulaziz many spouses and the mother of King Fahd and King Salman, monarchs of Saudi Arabia.
Document 4: Princess Ayah bint Faisal: Princess Ayah bint Faisal of Jordan (born 11 February 1990) is the daughter of Prince Faisal bin Hussein and Princess Alia and is a niece of King Abdullah II of Jordan. She is the eldest of Prince Faisal's children.
Document 5: Princess Aisha bint Hussein: Princess Aisha bint Hussein (born 23 April 1968) is the sister of King Abdullah II of Jordan and is the twin sister of Princess Zein. Her parents are Princess Muna al-Hussein and King Hussein.
Document 6: Princess Raiyah bint Hussein: Princess Raiyah bint Hussein (born 9 February 1986) is the youngest daughter of King Hussein of Jordan and Queen Noor. She has two brothers Hamzah and Hashem and an elder sister Princess Iman. She is a half-sister to King Abdullah II of Jordan.
Document 7: Princess Muna al-Hussein: Princess Muna al-Hussein (born Antoinette Avril Gardiner; 25 April 1941) is the mother of King Abdullah II of Jordan. She was the second wife of King Hussein; the couple divorced on 21 December 1972. She is British by birth, and changed her name to Muna al-Hussein upon marriage.
Document 8: Abdullah II of Jordan: Abdullah II bin Al-Hussein (Arabic: عبد الله الثاني بن الحسين‎ ‎ , "ʿAbdullāh aṯ-ṯānī ibn Al-Ḥusayn", born 30 January 1962) has been King of Jordan since the 1999 death of his father, King Hussein. According to Abdullah, he is a 41st-generation direct descendant of Muhammad as he belongs to the Hashemite family—who have ruled Jordan since 1921.
Document 9: Prince Omar bin Faisal: Prince Omar bin Faisal of Jordan (born 22 October 1993) is the second child and elder son of Prince Faisal bin Hussein and Princess Alia and is a nephew of King Abdullah II of Jordan. He is the younger brother of Princess Ayah, and older brother to the twins Princess Aisha and Princess Sara.
Document 10: Abdullah of Saudi Arabia: Abdullah bin Abdulaziz Al Saud (Arabic: عبدالله بن عبدالعزيز آل سعود‎ ‎ , "‘Abd Allāh ibn ‘Abd al-‘Azīz Āl Sa‘ūd ", ] ; 1 August 1924 – 23 January 2015) was King of Saudi Arabia and Custodian of the Two Holy Mosques from 2005 to his death in 2015.
Document 11: Princess Aisha bint Faisal: Princess Aisha bint Faisal of Jordan (born 27 March 1997) is the daughter of Prince Faisal bin Hussein and Princess Alia, and a niece of King Abdullah II of Jordan. She is the younger sister of Princess Ayah and Prince Omar, and is also twin to Princess Sara. She attends Amman Baccalaureate School, a private school in Amman, Jordan.
Document 12: Prince Faisal bin Hussein: Prince Faisal bin Hussein (Arabic: فيصل بن حسين‎ ‎ ; born 11 October 1963) is a son of King Hussein and Princess Muna, and the younger brother of King Abdullah II. From time to time, he has served as Regent during his brother's absences abroad.
Document 13: Princess Iman bint Hussein: Princess Iman bint Hussein (born 24 April 1983) is the daughter of King Hussein and Queen Noor of Jordan. She has two full brothers, Hamzah and Hashim, and a younger sister, Princess Raiyah. She is a half-sister to King Abdullah II of Jordan.
Document 14: Haya bint Hussein: Princess Haya bint Hussein (Arabic: الأميرة هيا بنت الحسين‎ ‎ ; born 3 May 1974) is the daughter of King Hussein of Jordan and his third wife, Queen Alia, and the half-sister of King Abdullah II. Princess Haya is the fourth and junior wife of the United Arab Emirates' prime minister, Sheikh Mohammed bin Rashid Al Maktoum, being known internationally as Princess Haya of Jordan. She is a 41st-generation direct descendant of Muhammad since she was born to the Hashemite family (who have ruled Jordan since 1921).
Document 15: Princess Zein bint Hussein: Princess Zein bint Hussein (born 23 April 1968) is the sister of King Abdullah II of Jordan and the twin sister of Princess Aisha bint Hussein.
ground_truth: 1999