Inline SVG for tiny yet precise aspect ratio preservation

<img src='data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 16 9%22 /%3E' alt='16:9 UTF8 SVG'><img src='data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 1 1%22 /%3E' alt='1:1 UTF8 SVG'><img src='data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 2 3%22 /%3E' alt='2:3 UTF8 SVG'><img src='data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 923 742%22 /%3E' alt='923:742 UTF8 SVG'>