On October 1, 1949, the People's Republic of China was proclaimed. How many years has it been since October 1 this year?
公元1949年10月1日，中华人民共和国宣告成立，到今年10月1日，建国多少周年．
<gadget id="calculator">2_016 - 1_949</gadget>
<output>67</output>

<result>67</result>