23, 382, 848 (July 2008 est.) 
19,533,560(2001 est.)

0-14 years: 37.8% (male 4,470,382/female 4,360,359)(2008 est.); 42% (male 4,120,240; female 4,063,960)(2000 est.)
15-64 years: 58.7% (male 6,852,363/female 6,866,470)(2008 est.); 55% (male 5,290,675; female 5,391,175)(2000 est.)
65 years and over: 3.6% (male 386,150/female 447,124) (2008 est.); 3% (male 318,890; female 348,620)(2000 est.)

1.928% (2008 est.) - 2.07% (2006 est.)

at birth: at birth: 1.03 male(s)/female (2008 est); 1.03 male(s)/female (2000 est.)
under 15 years: 1.02 male(s)/female (2008 est.); 1.01 male(s)/female (2000 est.)
15-64 years: 1 male(s)/female (2008 est.); 0.98 male(s)/female (2000 est.)
65 years and over: 0.86 male(s)/female 0.91 male(s)/female (2000 est.)
total population: 1 male(s)/female (2008 est.); 0.99 male(s)/female (2000 est.)

52.31 deaths/1,000 live births (2008 est.) 
57.43 deaths/1,000 live births (2000 est.)

3.89 children born/woman (2007 est.)
3.95 children born/woman (2000 est.)

definition: age 15 and over can read and write
total population: 57,9%
male: 66,4%
female: 49,8% (2000 census)