CRAM upset rate for Intel (Altera) cyclone IV FPGA EP4CGX110DF27I7 & EP4CGX110DF31I7

Hello, I´m looking for the CRAM upset rate for the following Intel (Altera) cyclone IV FPGA: Intel p/n EP4CGX110DF27I7 Intel p/n EP4CGX110DF31I7 It seems that this info is not available on Inte...