Table:
text: Usage share of web browsers
Net Applications (2004 Q4 to present)
Global usage share data from: Net Applications
Period Internet_Explorer Firefox Safari Opera Netscape Other_Mozilla
2011 Q2 54.36% 21.67% 7.30% 1.97% 0.79% 0.03%
2011 Q1 56.19% 22.11% 6.43% 2.20% 0.75% 0.03%
2010 Q4 58.27% 22.80% 5.59% 2.24% 0.67% 0.03%
2010 Q3 60.29% 22.93% 5.17% 2.40% 0.52% 0.02%
2010 Q2 60.01% 24.24% 4.78% 2.33% 0.49% 0.12%
2010 Q1 61.43% 24.40% 4.55% 2.37% 0.52% 0.15%
2009 Q4 63.67% 24.46% 4.41% 2.29% 0.32% 0.11%
2009 Q3 66.80% 23.06% 4.13% 2.07% 0.50% 0.09%
2009 Q2 68.06% 23.00% 3.67% 2.05% 0.68% 0.06%
2009 Q1 69.13% 22.67% 3.58% 2.18% 0.51% 0.06%
2008 Q4 71.99% 20.78% 3.11% 2.15% 0.41% 0.07%
2008 Q3 74.93% 19.07% 2.73% 2.06% 0.43% 0.07%

Question: Considering the usage percentage of web browsers from April 2000 to August 2003 for Nets Applications (Q4 2004 to present), what percentage of users were using Netscape over the period where 21.67% were using Firefox?

Question: What percentage of Opera's users use Safari during the period that 2.33% used Opera with usage share of web browser data worldwide from :net applications (2004 q4 to present)?

Question: Among global data usage share of web browsers by :,net applications (2004 Q4 to present) with 64% (64.02%) net users, what percentage of users used Opera during the period when 63.67% Internet Explorer used?