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

Breakdown TTM 12/31/2021 12/31/2020 12/31/2019 12/31/2018 > Total Revenue 19,296,000 13,857,000 10,571,000 20,972,000 20,758,000 Cost of Revenue 15,115,000 11,056,000 9,112,000 17,755,000 17,084,000 Gross Profit 4,181,000 2,801,000 1,459,000 3,217,000 3,674,000 > Operating Expense 1,069,000 1,043,000 1,108,000 1,279,000 1,153,000 Operating Income 3,112,000 1,758,000 351,000 1,938,000 2,521,000 > Net Non Operating Interest Inc.. -361,000 -392,000 -418,000 -368,000 -318,000 > Other Income Expense 20,000 -186,000 -399,000 29,000 142,000 Pretax Income 2,771,000 1,180,000 -466,000 1,599,000 2,345,000 Tax Provision 618,000 81,000 -199,000 326,000 438,000 > Net Income Common Stockhold. 2,153,000 1,099,000 -267,000 1,273,000 1,907,000 Diluted NI Available to Com Stock.. 2,153,000 1,099,000 -267,000 1,273,000 1,907,000 Basic EPS 3.36 -0.82 3.83 Diluted EPS 3.34 -0.82 3.80 Basic Average Shares 327,200 325,800 332,700 Diluted Average Shares 329,300 325,800 335,500 Total Operating Income as Reported 3,101,000 1,750,000 84.000 1,800,000 2,366,000 Total Expenses 16,184,000 12,099,000 10,220,000 19,034,000 18,237,000 Net Income from Continuing & Dis... 2,153,000 1,099,000 -267,000 1,273,000 1,907,000 Normalized Income 2,161,547 1,259,304 -72,090 1,382,848 2,033,015 Interest Income 24,000 28,000 27.000 26,000 22,000 Interest Expense 385,000 420,000 445,000 394,000 340,000 Net Interest Income -361,000 -392,000 -418,000 -368,000 -318,000 EBIT 3,156,000 1,600,000 -21,000 1,993,000 2,685,000 EBITDA 3,441,000 Reconciled Cost of Revenue 15,031,000 10,981,000 8,980,000 17,693,000 17,026,000 Reconciled Depreciation 285,000 295,000 478,000 403,000 284.000 Net Income from Continuing Oper... 2,153,000 1,099,000 -267,000 1,273,000 1,907,000 Total Unusual Items Excluding Goo.. -11,000 -172,000 -267,000 -138,000 -155,000 Total Unusual Items -11,000 -172,000 -267,000 -138,000 -155,000 Normalized EBITDA 3,452,000 2,067,000 724,000 2,534,000 3,124,000 Tax Rate for Calcs 0 0 0 Tax Effect of Unusual Items -2,453 -11,696 -72,090 -28,152 -28,985