Context: "The calculations are based on expenses incurred in the most recent six-month period. The fund’s annualized six-month expense ratios for that period are: 0.17% for Investor Shares, 0.07% for ETF Shares, 0.11% for Admiral Shares, 0.08% for Institutional Shares, 0.07% for Institutional Plus Shares, and 0.045% for Institutional Select Shares. The dollar amounts shown as “Expenses Paid” are equal to the annualized expense ratio multiplied by the average account value over the period, multiplied by the number of days in the most recent six-month period, then divided by the number of days in the most recent 12-month period (181/365)." Create a json object that lists the expense ratios for each share class in the format {"Class A": number, "Class B": number} etc. Provide response in all capital letters, no lowercase letters allowed.
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