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 provided vertical chart illustrates numeral information about women's first child's birth over the time period of 40 years.

Overall

,

It is clear that

the age of women's first child's birth is increasing.

Besides

, the gap between Mothers and their children's age increased until 2006.

To begin

,

According to

the chart and the key, In 1966, the Maximum percentage was girls between 19 to 24 with a number around 62%. In the second place, There were 25-30-year-old girls and under 19-year-old girls were in the third place who numbered around 33%.

Moreover

, in 1986, The orange bar changed its place with the grey bar and 25-30-year-old females became the maximum, Higher than other numbers. In 2006, The yellow bar was the highest number with the figure of 45%. Women over 40 years old always have the lowest number in the display chart and it was under 10% in all these years.

Finally

, The gap between all these ages was at its highest in 1966 and lowest in 2006.