1 Normal inferior vena cava diameter: 1.5 to 2.5 cm. 2  Less than 50% change in diameter with normal respiration or with a sniff. 3  Elevated Right Atrial Pressure: 4  Dilated inferior vena cava. 5  Dilated hepatic veins. 6  Little or no respiratory change in caval diameter.
Depending on how much money you earn, you may not pay Social Security taxes on your entire income. That's because a cap is set each year on the amount of income subject to Social Security taxes. Last year, that limit was $118,500, but in 2017, it jumped to $127,200.
The program is funded through tax withholdings. In 2017, Social Security withholding is 6.2% of the employee's gross pay. The employee must pay this until they reach the wage base limit. Earnings above the wage base limit are generally not subject to social security tax. The wage base limit for 2017 is $127,200.