What digit does this SVG image represent? <?xml version='1.0' encoding='UTF-8'?><svg version='1.1' xmlns='http://www.w3.org/2000/svg' width='28' height='28'><path d='M0 0 C9.24 0 18.48 0 28 0 C28 9.24 28 18.48 28 28 C18.76 28 9.52 28 0 28 C0 18.76 0 9.52 0 0 Z ' fill='#FFFFFF' transform='translate(0,0)'/><path d='M0 0 C1.30415252 4.22471944 0.26779592 6.7740136 -1 11 C-1.19161852 12.455265 -1.35861282 13.91399913 -1.5 15.375 C-1.665 16.57125 -1.83 17.7675 -2 19 C-2.66 19.33 -3.32 19.66 -4 20 C-4.84454356 16.62182575 -5.10844919 14.32534757 -4 11 C-6.31 11 -8.62 11 -11 11 C-10.50769231 4.47692308 -10.50769231 4.47692308 -7.9375 2.0625 C-7.298125 1.711875 -6.65875 1.36125 -6 1 C-7.875 6.75 -7.875 6.75 -9 9 C-6.07797583 9.14031566 -6.07797583 9.14031566 -3 8 C-1.53418386 5.46032588 -0.73467635 2.82914839 0 0 Z ' fill='#000000' transform='translate(19,5)'/></svg>