While there was an increase in the profitability of General Electric after the loss making period during the early decades of the twentieth century, still as late as the last decade of the twentieth century, the company was operating on barely sustainable margins.

While there was an increase in the profitability of General Electric after the loss making period during the early decades of the twentieth century, still as late as the last decade of the twentieth century

After the loss making period during the early decades of the twentieth century, General Electric's profitability improved, but as late as the last decade of the twentieth century

Even though General Electric's profitability, which improved over the early decades of twentieth century's loss making period, was better in the last decade of the twentieth century

Although General Electric's profitability increased after the early decades of the twentieth century, during which it was continually in loss, as late as the last decade of the twentieth century