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 chart illustrates the percentages of

women

, based on their maturity, who gave birth to their first child in three different

years

, which are 1966, 1986, and 2006. From the diagram, it can be seen that the tendency of young adults to have children has been decreasing,

while

the percentage of

women

in their 25s has been stagnant over the

years

.

However

, the proportion of

women

in other

age

groups fluctuated significantly and didn't have a certain trend. In the year 1966, it is shown that the second fraction of females clearly dominated other

age

groups with around 60% of them having their first child in their early 20s. Despite a decrease 20

years

later, the domination of

this

group still continued with roughly 50% of them still documented in the data. After being the biggest portion for

years

,

this

age

group was overtaken by the early 30s

women

in 2006 who got a constant increase over the

last

40

years

.

Besides

the gradual decline of the former group, the trend of

women

in their adolescent

years

giving birth to a child had

also

declined, starting from over 30% in 1966 to slightly over 10% in 2006.

On the other hand

, the

women

in their late 20s and 30s experienced a fluctuating direction over the

years

,

whereas

the

women

with the

age

older than 40 had the smallest portion of the information given.