Just a thought, maybe you should also keep track of what happens around when you get a burst of inspiration or a devastating lack thereof. Like if staying up till five AM gives you the BEST ideas, make a note, or, if you start watching a new anime or reading a manga, or you read something you DON'T like and you end up not wanting to write for three months straight, make a note. It's how I make the dry spells less dry and how I keep the bursts from derailing the existing projects....with marginal success.

Theoretically, this would be the data gathering year and next year would be when you apply what you concluded.