Analyze Marriott's last four annual cash flow statements. Identify trends, concerns, and opportunities.

Breakdown TTM 12/31/2021 12/31/2020 12/31/2019 12/31/2018 > Operating Cash Flow 2,354,000 1,177,000 1,639,000 1,685,000 2,357,000 > Investing Cash Flow -243,000 -187,000 35,000 -284,000 -52,000 > Financing Cash Flow -1,840,000 -463,000 -1,033,000 -1,508,000 -2,374,000 > End Cash Position 1,068,000 1,421,000 894,000 253,000 360,000 Capital Expenditure -261,000 -183,000 -135,000 -653,000 -556,000 Issuance of Capital Stock 0 2,000 0 7,000 4,000 Issuance of Debt 989,000 1,793,000 3,561,000 2,348,000 1,517,000 Repayment of Debt -1,480,000 -2,174,000 -4,177,000 -835,000 -397,000 Repurchase of Capital Stock -1,235,000 0 -150,000 -2,260,000 -2,850,000 Free Cash Flow 2,093,000 994,000 1,504,000 1,032,000 1,801,000