Fractions of solar wind types from three solar wind classifications per three Carrington rotations. From left to right: (a) Zhao et al. (2009), (b) Xu & Borovsky (2015), and (c) 7-means clustering. The green shading highlights 2009. All noncoronal hole wind types (Panel a): Slow and ICME. Panel (b): Sector-reversal, helmet streamer, and ejecta. Panel (c): Remaining five types identified by 7-means (numbered as types T1, ..., T5) are shown in different shades of gray to keep the focus on the coronal hole wind types of interest.