What is the change in the company's operating leases in 2020 and 2021?
{"2020": {"Operating Leases": 22207, "Capital Leases": 241, "Purchase Commitments": 328435}, "2021": {"Operating Leases": 13382, "Capital Leases": 1220, "Purchase Commitments": 24005}, "2022": {"Operating Leases": 10331, "Capital Leases": 1220, "Purchase Commitments": 5654}, "2023": {"Operating Leases": 8224, "Capital Leases": 1220, "Purchase Commitments": 3596}, "2024": {"Operating Leases": 7139, "Capital Leases": 1220, "Purchase Commitments": "\u2014"}, "Thereafter": {"Operating Leases": 31598, "Capital Leases": 47258, "Purchase Commitments": "\u2014"}, "Total minimum payments": {"Operating Leases": 92881, "Capital Leases": 52379, "Purchase Commitments": 361690}}
operating_leases_2020 = df["2020"]["Operating Leases"]
operating_leases_2021 = df["2021"]["Operating Leases"]
answer = operating_leases_2020 - operating_leases_2021