Year Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec. 24-Hour Annual Avg. 2018 2019 3990 3672 3581 3041 2852 2020 2612 3045 2883 1973 2910 3754 4473 4194 4071 3595 3351 2021 3942 4560 5428 5868 5704 5153 4388 4156 2952 4684 2022 3820 3932 3791 2023 2024