That changed as the ACA allowed people under the age of 26 to stay on their parents' insurance.
You can see the two lines cross in late-2010.
That was one of the first parts of the ACA to be implemented, going into effect six months after it was signed into law (in other words, September 2010). If the House bill had passed, the age would've been set at 27 instead. Some states already had dependent coverage laws similar to the ACA, though those states were exceptions. Currently, it seems as though NJ has the most generous dependent coverage law, covering dependents until the age of 31.
