Nice vid. What do you have to say graphics like this? (http://cdn.theatlantic.com/static/mt/assets/hua_hsu/assets_c/2012/11/cohen_singlemomchart2-thumb-615x590-106252.png)
and why does this end at the 80'shttps://lh5.googleusercontent.com/vYjOFJkYYexDU8znE2K21WifoJmfsjOJQD-ZZLFIz9QQO-5uAUlFks-asbkzVv5yJgV8nXi0VMEJm2RQ5NfbT7Da6_6cOgS2YNikZjRKOfg0Cr3oBb-6