IP addresses occupied by US Department of Defense

I note from fixedorbit.com that the US Department of Defense (DoD) runs the largest IP network with 53.44 million IP addresses. Excluding Class D and Class E IP addresses, there are 3.7 billion IP addresses available. The US DoD has taken away 1.5 % of all the available resource of the world. Wooooooo.., lets hope such unfair allocation won't happen again in IPv6.