Call me a "simple Simon", but I think this one hurts. Find the next 4 digit number in the sequence, and explain.
2084 1816 1979 1816 2106 2329 1943 2247 2106 2084 2106 2188 2329 2061 2329 2084 1943 2084 2188 1979 2247 1943 2247 1979 2084 2084 2188 2084 1943 2061 2329 2106