The self-employment company Invoicery Group's net sales declined 2.3 percent to SEK 143 million in July, from SEK 146.3 million a year earlier. On a rolling twelve-month basis, revenue increased 5.1 percent to SEK 1,939 million. The number of self-employed workers in Sweden increased 0.7 percent to 5,544.In June, which is also a summer month, revenue was up 11.4 percent.