Reading a probability off a joint table

Let the joint distribution of $(X,Y)$ be given by the table below (Y in $\{0,1\}$ down the side, X in $\{0,1,2,3\}$ across the top): $P(0,0)=\frac1{10},P(1,0)=\frac1{20},P(2,0)=\frac1{20}, P(3,0)=\frac1{20}; P(0,1)=\frac3{20},P(1,1)=\frac15, P(2,1)=\frac3{20},P(3,1)=\frac5{20}$. Then $P[X\le1]$ is: