Expectation of life at birth and total fertility rate 出生时平均预期寿命及总和生育率
2.
The third factor was that females generally live longer than males - - the expectation of life at birth of females in 2003 was 84 . 3 years while that for males was only 78 . 6 years 第三个因素是女性普遍较长寿- -在二零零三年，女性出生时平均预期寿命是84 . 3年，而男性则为78
