MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS maturity date of January 2017 and $700.0 million of senior unsecured notes at a fixed interest rate of 4.13% with a maturity date  of December 2021. As further discussed in “Financing and Debt” below, on October 5, 2011, we entered into a new $4.0 billion  unsecured revolving credit facility, or Credit Facility. The portfolio data discussed in this overview includes the following key operating statistics: ending occupancy; average base  minimum rent per square foot; and total sales per square foot for our domestic assets. We include acquired properties in this data  beginning in the year of acquisition and remove properties sold in the year disposed. For comparative purposes, we separate the  information below related to community/lifestyle centers and our investment in the Mills portfolio from our other U.S. operations.  We also do not include any properties located outside of the United States. During 2011, we made changes to the method and  presentation of certain of our operational statistics as defined below. The following table sets forth these key operating statistics for: ● properties that are consolidated in our consolidated financial statements, ● properties we account for under the equity method of accounting as joint ventures, and ● the foregoing two categories of properties on a total portfolio basis. United States Portfolio Data (1) Percentages may not recalculate due to rounding. Percentage and basis point changes are representative of the change from the comparable prior period. 12 Simon Property Group, Inc. %/Basis Points  %/Basis Points  2011 Change (1) 2010 Change (1) 2009 U.S. Regional Malls and Premium Outlets:  Ending Occupancy  Consolidated   94.9% −20 bps 95.1% +110 bps 94.0% Unconsolidated   94.2%  +180 bps 92.4% +100 bps 91.4% Total Portfolio  94.8% +30 bps 94.5% +110 bps 93.4% Average Base Minimum Rent per Square Foot  Consolidated  $ 37.45 3.6% $ 36.14 (2.0%)  $ 36.88 Unconsolidated  $ 48.76 12.2% $ 43.44 0.6% $ 43.19 Total Portfolio  $ 39.42 4.4% $ 37.77 (1.8%)  $ 38.47 Total Sales per Square Foot  Consolidated  $ 518 9.1% $  475 7.5% $  442 Unconsolidated  $ 638 21.8% $  524 8.5% $  483 Total Portfolio  $  536 10.7% $  484 7.1% $  452 The Mills ® :  Ending Occupancy  95.0% +130 bps 93.7% −20 bps 93.9% Average Base Minimum Rent per Square Foot $ 20.36 2.5% $ 19.86 1.2% $ 19.62 Total Sales per Square Foot $ 448 9.8% $  408 10.6% $  369 Mills Regional Malls: Ending Occupancy   88.6% −180 bps 90.4% +110 bps 89.3% Average Base Minimum Rent per Square Foot $ 34.98 — $ 34.97 (1.2%)  $ 35.41 Total Sales per Square Foot $ 413 5.1% $  393 3.4% $  380 Community/Lifestyle Centers:  Ending Occupancy  93.4% +180 bps 91.6% +90 bps 90.7% Average Base Minimum Rent per Square Foot $ 13.75 2.8% $ 13.38 (0.5%)  $ 13.45