Happy new year?
one big question is where is sp going to end of year and first days of new year. the years 2921, 2020, 2019, 2010, and 1998 appear most similar. nothing special to end of year. then big up starting near the end of Jan.
too small a sample size - too many changes. but it looks like 4 of 5 up to end of year, up big 58. up big 44. and the previous 3 unchanged.