Race relations is a specious concept, and a self-perpetuating problem. What does it mean? It means some arbitrary number of some arbitrary racial group feel arbitrarily better or worse about some other arbitrary number of another arbitrary racial group. Nobody on the planet can measure that. And 'the election of the US' first African-American president' may mean the world to some people and nothing at all to other people. Who says that's a valid benchmark anyway?
The only thing you can measure is how tightly people hold on to racial stereotypes and racial thinking. In other words, you can determine, individual by individual how race affects their thinking. But what does that mean at an aggregate level? It can't mean anything unless it means the same thing to everyone, like 'a touchdown is 6 points'. What is 6 points of racism? What is 6 points of race relations? You can't define it.
Every time somebody says 'racism still exists, but we have a long way to go', I ask what do you mean we? A black man graduated from Yale in Physics in 1876 Phi Beta Kappa. Did racism exist? Did he have a long way to go? John Brown pledged the lives of himself and his sons to militantly intervene against racial prejudice. Did he have a long way to go? What about the free people of color in New Orleans who defied the law of Louisiana against freeing slaves, by buying them and then making them do nothing? Did they have a long way to go?
I say anybody who says 'we have a long way to go' actually means, 'I personally need X people in Y race to do Z before I shutup and enjoy my own life'. That's race relations for you, a self-perpetuating problem.