_
In 2009 there were 690,000 AIDS orphans in the country
(UNAIDS (2010) 'UNAIDS report on the global AIDS epidemic')

and.....

AIDS orphans made up half of all orphans in the country
(Government Republic of Zambia (2010, April) 'Zambia Country Report: Monitoring the Declaration of Commitment on HIV and AIDS and the Universal Access Biennial Report")

Population: (July 2011 est.)
13,881,336 

Age structure: (2011 est.)
0-14 years: 46.7% (male 3,253,125/female 3,228,844)
15-64 years: 50.8% (male 3,544,640/female 3,508,344)
65 years and over: 2.5% (male 148,531/female 197,852)

Median age: (2011 est.)
total: 16.5 years
male: 16.5 years
female: 16.6 years

Total fertility rate: (2011 est.)
5.98 children born/woman
country comparison to the world: 8

HIV/AIDS - adult prevalence rate: (2009 est.)
13.5%
country comparison to the world: 6

HIV/AIDS - people living with HIV/AIDS: (2009 est.)
980,000
country comparison to the world: 11

HIV/AIDS - deaths: (2009 est.)
45,000
country comparison to the world: 10

***Statistics obtained from CIA World Fact Book