| S&P 500 | OKE | | 2019 - 6,800,000 2020 - 6,300,000 2021 - 6,500,000 Fluctuating | 2019 - 4,700,000 2020 - 4,500,000 2021 - 5,100,000 Fluctuating | 2019 - 29,228 2020 - 24,240 2021 - 13,522 -54% | 2019 - 7,362,626 2020 - 6,692,608 2021 - 7,214,995 Fluctuating | 2019 - No data 2020 - No data 2021 - No data No data | 2019 - 0.32 2020 - 0.69 2021 - 0.45 Fluctuating |