Don't know, but this Polk data says ~1100 sold in Cali in June, which implies ~ 600 in Apr and May. That implies the mix is tilting more heavily Cali now....
One could say the higher numbers show the car sells itself (probably true), or one could say a high Cali mix shows the incentives play a huge role in adoption (probably true).
Compare to Prius which is like 25-30% of sales in Cali.