Please give me some feedback on my IELTS writing task 1; I welcome all constructive feedback. Thanks a lot.

https://docs.google.com/document/d/1tDlC6tj9plOcSMb_he6P2ojICKNre20K7aUCcDd4NYU/edit?usp=sharing (the prompt is in here)

The given visual demonstrates the percentage regarding ages - from below 19 to over 40 - in which Australian women had their first child born in 1966, 1986 and 2006. Overall, it is conspicuous that women living in 1966 and 1986 first gave birth when they were mostly between under 19 to 30, whereas it was between 25 and 39 for those in 2006.

In 1966, during their late 10s and early 20s, approximately 60 percent of Australian women gave birth to their first kid, which was nearly 20 percent higher than that in 1986 and almost twofold the 2006 figure. Additionally, half of 1986 women - in their late 20s - had their first children born, which was 10 percent higher than that in 1966 and 2006. Furthermore, almost 40 percent of those in 2006 got their first child in their early 30s, which doubled and quadrupled that in 1986 and 1966, respectively.

According to the graph, it is conspicuously illustrated that the percentage of birth in teenage has dropped continuously, from approximately 35 percent to about 10 percent. Conversely, more first child is born when their moms were in their late thirties, from less than a tenth to one-third. Moreover, percentage of first births given when moms are over 40 remains stable, exactly under 10%, over time.