Nearing giving blood

well, i'm nearing giving blood now, I'm quite excited no-one i know gives blood and I read something shocking that only 5 out of 100 people give blood! thats shocking :(
I asked people if they would ever give blood, family, frieds ect... and they all said no.
So I'd like to say, could you give blood if you can? you could help save a life :)