What was the change in future lease commitments between 2021 and 2022?
{"2021": {"Future Lease Commitments(1)": 144, "Purchase Obligations": 168, "Asset Retirement Obligations": 1, "Total": 313}, "2022": {"Future Lease Commitments(1)": 141, "Purchase Obligations": 74, "Asset Retirement Obligations": 3, "Total": 218}, "2023": {"Future Lease Commitments(1)": 127, "Purchase Obligations": 13, "Asset Retirement Obligations": 2, "Total": 142}, "2024": {"Future Lease Commitments(1)": 101, "Purchase Obligations": "\u2014", "Asset Retirement Obligations": "\u2014", "Total": 101}, "2025": {"Future Lease Commitments(1)": 77, "Purchase Obligations": "\u2014", "Asset Retirement Obligations": 2, "Total": 79}, "Thereafter": {"Future Lease Commitments(1)": 612, "Purchase Obligations": "\u2014", "Asset Retirement Obligations": 5, "Total": 617}, "Total": {"Future Lease Commitments(1)": 1202, "Purchase Obligations": 255, "Asset Retirement Obligations": 13, "Total": 1470}}
future_lease_commitments_2022 = df["2022"]["Future Lease Commitments(1)"]
future_lease_commitments_2021 = df["2021"]["Future Lease Commitments(1)"]
answer = future_lease_commitments_2022 - future_lease_commitments_2021