The U.S. Census Bureau expects the U.S.A. population to grow to reach these estimates over the next few decades: 1  2010 - 307,745,538. 2  2020 - 336,031,546. 3  2030 - 363,811,435. 4  2040 - 392,172,658. 5  2043 - 400,527,776 (the year of 400 million)
Symptoms of separation anxiety disorder include the following: Subjective feeling of anxiety; Unrealistic worries about the safety of loved ones; Reluctance to fall asleep if not near the primary attachment figure; Excessive dismay (for example, tantrums) if separation from the primary attachment figure is imminent; Nightmares with separation-related themes
Physical symptoms of anxiety include shortness of breath, muscle tension, a fast heartbeat and dizziness. Anxiety manifestations also include nausea, irritability, trouble sleeping, difficulty concentrating, trouble breathing and trembling. Anxiety occurs when the chemicals located in your brain (neurotransmitters) are decreased.