According to the NRDC it was nearly $100 billion - about $1100 per taxpayer. While last year may have been a spike it is likely the average will just keep increasing. Most of the damage was covered by taxpayers rather than insurance.
After Sandy the term resilient seems to be coming into general use - mostly replacing sustainable. In this part of the country (NJ) a huge number of small electric generators have been installed. Being without electricity for a week or two in freezing weather was not particularly fun and many came to see them as extremely desirable necessities. Permanent natural gas generators are frequently in the $5,000 to $10,000 range and are a very expensive and inefficient power source. Perhaps this should be viewed as an additional cost burden on families who can no longer trust the power infrastructure.