What was the total Senior Notes as a percentage of total contractual obligations?
{"Senior Notes(1)": {"Total": 4552, "Less than 1 year": 1372, "1-3 years": 1686, "3-5 years": 98, "More than 5 years": 1396}, "Note payable to Dell(2)": {"Total": 283, "Less than 1 year": 5, "1-3 years": 278, "3-5 years": "\u2014", "More than 5 years": "\u2014"}, "Term Loan(3)": {"Total": 1500, "Less than 1 year": 1500, "1-3 years": "\u2014", "3-5 years": "\u2014", "More than 5 years": "\u2014"}, "Future Lease Commitments(4)": {"Total": 1202, "Less than 1 year": 144, "1-3 years": 268, "3-5 years": 178, "More than 5 years": 612}, "Purchase obligations": {"Total": 255, "Less than 1 year": 168, "1-3 years": 87, "3-5 years": "\u2014", "More than 5 years": "\u2014"}, "Tax obligations(5)": {"Total": 545, "Less than 1 year": 53, "1-3 years": 104, "3-5 years": 227, "More than 5 years": 161}, "Asset Retirement Obligations": {"Total": 13, "Less than 1 year": 1, "1-3 years": 5, "3-5 years": 2, "More than 5 years": 5}, "Sub-Total": {"Total": 8350, "Less than 1 year": 3243, "1-3 years": 2428, "3-5 years": 505, "More than 5 years": 2174}, "Uncertain tax positions(6)": {"Total": 479, "Less than 1 year": "", "1-3 years": "", "3-5 years": "", "More than 5 years": ""}, "Total": {"Total": 8829, "Less than 1 year": "", "1-3 years": "", "3-5 years": "", "More than 5 years": ""}}
senior_notes_total = df["Senior Notes(1)"]["Total"]
total_total = df["Total"]["Total"]
answer = senior_notes_total / total_total * 100.0