RIYADH: Oil prices fell by nearly 2 percent on Wednesday as a stronger US dollar and weak data from top oil importer China raised demand fears. Brent crude futures for August delivery were down $1.69, or 2.30 percent, to $71.85 a barrel at 3:15 p.m. Saudi time, while US West Texas Intermediate crude fell $1.99, or 2.87 percent, to $67.47. China’s manufacturing activity