Population:
20,090,437 (July 2005 est.)

Age structure:
0-14 years: 19.8% (male 2,038,809/female 1,943,563)
15-64 years: 67.2% (male 6,815,600/female 6,695,189)
65 years and over: 12.9% (male 1,145,274/female 1,452,002) (2005 est.)

Median age:
total: 36.56 years
male: 35.74 years
female: 37.4 years (2005 est.)

Population growth rate:
0.87% (2005 est.)

Birth rate:
12.26 births/1,000 population (2005 est.)

Death rate:
7.44 deaths/1,000 population (2005 est.)

Net migration rate:
3.91 migrant(s)/1,000 population (2005 est.)

Sex ratio:
at birth: 1.05 male(s)/female
under 15 years: 1.05 male(s)/female
15-64 years: 1.02 male(s)/female
65 years and over: 0.79 male(s)/female
total population: 0.99 male(s)/female (2005 est.)