Two of the estimates have years associated with them: 1994 and 1999. The survey itself was published in 2013 so didn't have the data available that fivethirtyei

Two of the estimates have years associated with them: 1994 and 1999. The survey itself was published in 2013 so didn't have the data available that fivethirtyeight cited. I think it's time for researchers to update their capacity estimates.