The supplied bar chart represents data about females in different age that gave a birth to the first child in Australia in the year 1966, 1986 and 2006.

The supplied bar chart represents data about

females

of different ages that gave birth to their first child in Australia in the year 1966, 1986 and 2006.

Overall

,

women

aged over 40 consisted of the least percentage that gave birth to their first child,

while

females

under 19 made up with stable proportion. Turning to the details of the chart, in 1966 over 30% of young girls aged under 19 gave childbirth,

however

after two decades and in 2006 it decreased to 20% (1986) and 28% (approximately) in 2006.

Females

aged 19-24 were uppermost among all periods in the year 1966 which composed over 60%. In the following, periods it rapidly dropped with proportions of 35% and under 30%. Getting back to the details,

women

at the age of 25-30 gave birth to their first baby about 35%. In 1986 involved half

percent

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per cent

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of

women

and following period it was 47% (about). Middle-aged

women

(30-34, 34-39) in 1966 and 1986 were less than 20%. Adult

females

above 40 composed lower than 7% (approximately).