public void setFailureCountSlidingWindowInterval(
            long failureCountSlidingWindowInterval) {
        this.failureCountSlidingWindowInterval = failureCountSlidingWindowInterval;
    }
The supported percentile values.
These correspond to the various Monitor methods defined below.
No, this is not pretty, but that's the way it is.
ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/ServerStats.java