Past 10th Jan, FEI updated the world ranking for open riders. This is an historic ranking which varies monthly according score got by rider in each competition. As you have guessed, 2017 ended up with this top three positions. Congratulations to all competitors, keep on going!

Rank Previous Athlete Country Points
11Pilar SaraviaURU2584
23Cheryl Van DeusenUSA2113
32Sabrina ArnoldGER2020
46Daniele SerioliITA1646
57Omar Blanco RodrigoESP1602
65Michaela SupekovaSVK1492
74Angel Soy CollESP1480
818Maria Alvarez PontonESP1383
910Mansour Saeed Mohd Al FaresiUAE1329
1011Nicola ThorneGBR1322

To check the whole ranking, see the following link.

Source: FEI Official Site