Table:
text: Capital gains tax in the United States
History
History
Ordinary_income_rate Long_term_capital_gain_rate Short_term_capital_gain_rate Long_term_gain_on_commercial_buildings_ Long_term_gain_on_collectibles
10% 0% 10% 10% 10%
15% 0% 15% 15% 15%
25% 15% 25% 25% 25%
28% 15% 28% 25% 28%
33% 15% 33% 25% 28%
35% 15% 35% 25% 28%

Question: What long-term gain for collectibles coincides with the ordinary 15% income rate on capital gains tax in United States history?