As you said 5 months , mostly if your sites are also five months old. Then it will gradually increase over the time
Make good niche sites like link property listing stock market news and guide for taking good health plans . By this you can earn good money .
Just give us a screenshot of your webpage so that we can tell you whether your ad placment is good enough or not. Adsense is really paying low from July and this one is still continue. Just check whether ads showing is releavnt with your article or not ? Check your bounce rates as well ...