origin_date,ar_const,ar_phi
2024-01-31,1.740987811847352,0.34112458750263974
2024-04-30,1.735383972337271,0.340324255532007
2024-07-31,1.7410078382331322,0.339182491319633
2024-10-31,1.7535732188313151,0.342234370772098
2025-01-31,1.7525583227108583,0.3421075053688942
2025-04-30,1.731218830940902,0.34347535386856687
2025-07-31,1.7547184424238143,0.3377599442514625
2025-12-31,1.7761306755042419,0.3353427675120714