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Desktop Top Operating System Share Trend | November, 2009 to November, 2011 |
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| Month | Windows XP | Windows 7 | Windows Vista | Mac OS X 10.6 | Mac OS X 10.7 | Other |
|---|---|---|---|---|---|---|
| November, 2009 | 69.99% | 4.06% | 18.80% | 1.40% | 0.00% | 5.75% |
| December, 2009 | 68.90% | 5.80% | 18.17% | 1.62% | 0.00% | 5.50% |
| January, 2010 | 67.37% | 7.71% | 17.79% | 1.83% | 0.00% | 5.29% |
| February, 2010 | 66.74% | 9.09% | 16.83% | 1.91% | 0.00% | 5.43% |
| March, 2010 | 65.80% | 10.45% | 16.34% | 2.17% | 0.00% | 5.24% |
| April, 2010 | 64.80% | 11.94% | 15.95% | 2.34% | 0.00% | 4.97% |
| May, 2010 | 64.02% | 12.98% | 15.61% | 2.39% | 0.00% | 5.00% |
| June, 2010 | 63.90% | 14.02% | 15.02% | 2.53% | 0.00% | 4.53% |
| July, 2010 | 63.57% | 14.86% | 14.73% | 2.55% | 0.00% | 4.29% |
| August, 2010 | 62.72% | 16.30% | 14.35% | 2.66% | 0.00% | 3.97% |
| September, 2010 | 61.91% | 17.64% | 13.75% | 2.80% | 0.00% | 3.90% |
| October, 2010 | 60.76% | 18.90% | 13.33% | 2.89% | 0.00% | 4.12% |
| November, 2010 | 59.80% | 20.34% | 13.04% | 3.03% | 0.00% | 3.78% |
| December, 2010 | 58.92% | 21.67% | 12.58% | 3.16% | 0.00% | 3.67% |
| January, 2011 | 57.62% | 23.26% | 12.15% | 3.47% | 0.00% | 3.49% |
| February, 2011 | 57.51% | 24.09% | 11.49% | 3.55% | 0.00% | 3.36% |
| March, 2011 | 56.78% | 25.23% | 11.02% | 3.65% | 0.01% | 3.31% |
| April, 2011 | 55.84% | 26.36% | 10.73% | 3.83% | 0.01% | 3.23% |
| May, 2011 | 55.22% | 27.27% | 10.46% | 3.87% | 0.01% | 3.17% |
| June, 2011 | 54.04% | 28.68% | 10.06% | 3.99% | 0.02% | 3.20% |
| July, 2011 | 52.80% | 29.66% | 9.84% | 4.00% | 0.33% | 3.36% |
| August, 2011 | 52.46% | 30.60% | 9.40% | 3.46% | 1.03% | 3.06% |
| September, 2011 | 50.50% | 32.42% | 9.09% | 3.53% | 1.41% | 3.06% |
| October, 2011 | 48.03% | 34.62% | 8.85% | 3.62% | 1.83% | 3.04% |
| November, 2011 | 48.89% | 34.60% | 8.48% | 3.22% | 1.86% | 2.94% |